diff --git a/apps/common/mobile/lib/controller/collaboration/Collaboration.jsx b/apps/common/mobile/lib/controller/collaboration/Collaboration.jsx
index 6cb82db7c..31e8b7b5f 100644
--- a/apps/common/mobile/lib/controller/collaboration/Collaboration.jsx
+++ b/apps/common/mobile/lib/controller/collaboration/Collaboration.jsx
@@ -46,6 +46,11 @@ class CollaborationController extends Component {
             api.asc_SetFastCollaborative(isFastCoauth);
             window.editorType === 'de' && api.SetCollaborativeMarksShowType(Asc.c_oAscCollaborativeMarksShowType.None);
             api.asc_setAutoSaveGap(1);
+        } else if (appOptions.canLiveView) { // viewer
+            isFastCoauth = !(appOptions.config.coEditing && appOptions.config.coEditing.mode==='strict');
+            api.asc_SetFastCollaborative(isFastCoauth);
+            window.editorType === 'de' && api.SetCollaborativeMarksShowType(Asc.c_oAscCollaborativeMarksShowType.None);
+            api.asc_setAutoSaveGap(1);
         } else {
             isFastCoauth = false;
             api.asc_SetFastCollaborative(isFastCoauth);
diff --git a/apps/documenteditor/mobile/src/controller/Main.jsx b/apps/documenteditor/mobile/src/controller/Main.jsx
index 12babf8d8..ce6156a16 100644
--- a/apps/documenteditor/mobile/src/controller/Main.jsx
+++ b/apps/documenteditor/mobile/src/controller/Main.jsx
@@ -80,8 +80,8 @@ class MainController extends Component {
             };
 
             const loadConfig = data => {
-                const _t = this._t;
-
+                const { t } = this.props;
+                const _t = t('Main', {returnObjects:true});
                 EditorUIController.isSupportEditFeature();
 
                 this.editorConfig = Object.assign({}, this.editorConfig, data.config);
@@ -133,18 +133,18 @@ class MainController extends Component {
                     docInfo.put_Lang(this.editorConfig.lang);
                     docInfo.put_Mode(this.editorConfig.mode);
 
-                    // var coEditMode = !(this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object') ? 'fast' : // fast by default
-                    //     this.editorConfig.mode === 'view' && this.editorConfig.coEditing.change!==false ? 'fast' : // if can change mode in viewer - set fast for using live viewer
-                    //         this.editorConfig.coEditing.mode || 'fast';
-                    // docInfo.put_CoEditingMode(coEditMode);
-                    docInfo.put_CoEditingMode('strict'); // need to change!!!
+                    let type = /^(?:(pdf|djvu|xps|oxps))$/.exec(data.doc.fileType);
+                    let coEditMode = (type && typeof type[1] === 'string') ? 'strict' :  // offline viewer for pdf|djvu|xps|oxps
+                                    !(this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object') ? 'fast' : // fast by default
+                                    this.editorConfig.mode === 'view' && this.editorConfig.coEditing.change!==false ? 'fast' : // if can change mode in viewer - set fast for using live viewer
+                                    this.editorConfig.coEditing.mode || 'fast';
+                    docInfo.put_CoEditingMode(coEditMode);
 
                     let enable = !this.editorConfig.customization || (this.editorConfig.customization.macros !== false);
                     docInfo.asc_putIsEnabledMacroses(!!enable);
                     enable = !this.editorConfig.customization || (this.editorConfig.customization.plugins !== false);
                     docInfo.asc_putIsEnabledPlugins(!!enable);
 
-                    let type = /^(?:(pdf|djvu|xps|oxps))$/.exec(data.doc.fileType);
                     if (type && typeof type[1] === 'string') {
                         this.permissions.edit = this.permissions.review = false;
                     }
@@ -183,13 +183,15 @@ class MainController extends Component {
             const onEditorPermissions = params => {
                 const licType = params.asc_getLicenseType();
 
+                const { t } = this.props;
+                const _t = t('Main', {returnObjects:true});
                 // check licType
                 if (Asc.c_oLicenseResult.Expired === licType ||
                     Asc.c_oLicenseResult.Error === licType ||
                     Asc.c_oLicenseResult.ExpiredTrial === licType) {
                     f7.dialog.create({
-                        title   : this._t.titleLicenseExp,
-                        text    : this._t.warnLicenseExp
+                        title   : _t.titleLicenseExp,
+                        text    : _t.warnLicenseExp
                     }).open();
                     return;
                 }
@@ -409,7 +411,9 @@ class MainController extends Component {
                 this.api.asc_continueSaving();
             }, 500);
 
-            return this._t.leavePageText;
+            const { t } = this.props;
+            const _t = t('Main', {returnObjects:true});
+            return _t.leavePageText;
         }
     }
 
@@ -426,6 +430,10 @@ class MainController extends Component {
             (licType === Asc.c_oLicenseResult.Connections || licType === Asc.c_oLicenseResult.UsersCount || licType === Asc.c_oLicenseResult.ConnectionsOS || licType === Asc.c_oLicenseResult.UsersCountOS
                 || licType === Asc.c_oLicenseResult.SuccessLimit && (appOptions.trialMode & Asc.c_oLicenseMode.Limited) !== 0))
             this._state.licenseType = licType;
+
+        if (licType !== undefined && appOptions.canLiveView && (licType===Asc.c_oLicenseResult.ConnectionsLive || licType===Asc.c_oLicenseResult.ConnectionsLiveOS))
+            this._state.licenseType = licType;
+
         if (this._isDocReady && this._state.licenseType)
             this.applyLicense();
     }
@@ -457,7 +465,13 @@ class MainController extends Component {
             return;
         }
 
-        if (this._state.licenseType) {
+        if (appOptions.config.mode === 'view') {
+            if (appOptions.canLiveView && (this._state.licenseType===Asc.c_oLicenseResult.ConnectionsLive || this._state.licenseType===Asc.c_oLicenseResult.ConnectionsLiveOS)) {
+                appOptions.canLiveView = false;
+                this.api.asc_SetFastCollaborative(false);
+            }
+            Common.Notifications.trigger('toolbar:activatecontrols');
+        } else if (this._state.licenseType) {
             let license = this._state.licenseType;
             let buttons = [{text: 'OK'}];
             if ((appOptions.trialMode & Asc.c_oLicenseMode.Limited) !== 0 &&
@@ -526,7 +540,8 @@ class MainController extends Component {
 
     onServerVersion (buildVersion) {
         if (this.changeServerVersion) return true;
-        const _t = this._t;
+        const { t } = this.props;
+        const _t = t('Main', {returnObjects:true});
 
         if (About.appVersion() !== buildVersion && !About.compareVersions()) {
             this.changeServerVersion = true;
@@ -797,7 +812,9 @@ class MainController extends Component {
         this.api.asc_OnSaveEnd(data.result);
 
         if (data && data.result === false) {
-            const _t = this._t;
+            const { t } = this.props;
+            const _t = t('Main', {returnObjects:true});
+
             f7.dialog.alert(
                 (!data.message) ? _t.errorProcessSaveResult : data.message,
                 _t.criticalErrorTitle
@@ -814,7 +831,9 @@ class MainController extends Component {
             Common.Notifications.trigger('api:disconnect');
 
             if (!old_rights) {
-                const _t = this._t;
+                const { t } = this.props;
+                const _t = t('Main', {returnObjects:true});
+
                 f7.dialog.alert(
                     (!data.message) ? _t.warnProcessRightsChange : data.message,
                     _t.notcriticalErrorTitle,
@@ -827,7 +846,9 @@ class MainController extends Component {
     onDownloadAs () {
         const appOptions = this.props.storeAppOptions;
         if ( !appOptions.canDownload && !appOptions.canDownloadOrigin) {
-            Common.Gateway.reportError(Asc.c_oAscError.ID.AccessDeny, this._t.errorAccessDeny);
+            const { t } = this.props;
+            const _t = t('Main', {returnObjects:true});
+            Common.Gateway.reportError(Asc.c_oAscError.ID.AccessDeny, _t.errorAccessDeny);
             return;
         }
 
@@ -854,7 +875,8 @@ class MainController extends Component {
     }
 
     onUpdateVersion (callback) {
-        const _t = this._t;
+        const { t } = this.props;
+        const _t = t('Main', {returnObjects:true});
 
         this.needToUpdateVersion = true;
         Common.Notifications.trigger('preloader:endAction', Asc.c_oAscAsyncActionType['BlockInteraction'], this.LoadingDocument);
@@ -946,7 +968,8 @@ class MainController extends Component {
             if (value === 1) {
                 this.api.asc_runAutostartMacroses();
             } else if (value === 0) {
-                const _t = this._t;
+                const { t } = this.props;
+                const _t = t('Main', {returnObjects:true});
                 f7.dialog.create({
                     title: _t.notcriticalErrorTitle,
                     text: _t.textHasMacros,
diff --git a/apps/documenteditor/mobile/src/store/appOptions.js b/apps/documenteditor/mobile/src/store/appOptions.js
index 83a839d05..caf9cea01 100644
--- a/apps/documenteditor/mobile/src/store/appOptions.js
+++ b/apps/documenteditor/mobile/src/store/appOptions.js
@@ -145,6 +145,8 @@ export class storeAppOptions {
         this.canUseReviewPermissions && AscCommon.UserInfoParser.setReviewPermissions(permissions.reviewGroups, this.customization.reviewPermissions);
         this.canUseCommentPermissions && AscCommon.UserInfoParser.setCommentPermissions(permissions.commentGroups);    
         this.canUseUserInfoPermissions && AscCommon.UserInfoParser.setUserInfoPermissions(permissions.userInfoGroups);
+
+        this.canLiveView = !!params.asc_getLiveViewerSupport() && (this.config.mode === 'view') && !(type && typeof type[1] === 'string') && isSupportEditFeature;
     }
     setCanViewReview (value) {
         this.canViewReview = value;
diff --git a/apps/presentationeditor/mobile/src/controller/Main.jsx b/apps/presentationeditor/mobile/src/controller/Main.jsx
index 50f654eeb..77ddc83a4 100644
--- a/apps/presentationeditor/mobile/src/controller/Main.jsx
+++ b/apps/presentationeditor/mobile/src/controller/Main.jsx
@@ -73,7 +73,8 @@ class MainController extends Component {
             };
 
             const loadConfig = data => {
-                const _t = this._t;
+                const { t } = this.props;
+                const _t = t('Controller.Main', {returnObjects:true});
 
                 EditorUIController.isSupportEditFeature();
 
@@ -124,11 +125,10 @@ class MainController extends Component {
                     docInfo.put_Lang(this.editorConfig.lang);
                     docInfo.put_Mode(this.editorConfig.mode);
 
-                    // var coEditMode = !(this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object') ? 'fast' : // fast by default
-                    //     this.editorConfig.mode === 'view' && this.editorConfig.coEditing.change!==false ? 'fast' : // if can change mode in viewer - set fast for using live viewer
-                    //         this.editorConfig.coEditing.mode || 'fast';
-                    // docInfo.put_CoEditingMode(coEditMode);
-                    docInfo.put_CoEditingMode('strict'); // need to change!!!
+                    let coEditMode = !(this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object') ? 'fast' : // fast by default
+                                    this.editorConfig.mode === 'view' && this.editorConfig.coEditing.change!==false ? 'fast' : // if can change mode in viewer - set fast for using live viewer
+                                    this.editorConfig.coEditing.mode || 'fast';
+                    docInfo.put_CoEditingMode(coEditMode);
 
                     let enable = !this.editorConfig.customization || (this.editorConfig.customization.macros !== false);
                     docInfo.asc_putIsEnabledMacroses(!!enable);
@@ -290,7 +290,9 @@ class MainController extends Component {
                 this.api.asc_continueSaving();
             }, 500);
 
-            return this._t.leavePageText;
+            const { t } = this.props;
+            const _t = t('Controller.Main', {returnObjects:true});
+            return _t.leavePageText;
         }
     }
 
@@ -499,6 +501,10 @@ class MainController extends Component {
             (licType === Asc.c_oLicenseResult.Connections || licType === Asc.c_oLicenseResult.UsersCount || licType === Asc.c_oLicenseResult.ConnectionsOS || licType === Asc.c_oLicenseResult.UsersCountOS
                 || licType === Asc.c_oLicenseResult.SuccessLimit && (appOptions.trialMode & Asc.c_oLicenseMode.Limited) !== 0))
             this._state.licenseType = licType;
+
+        if (licType !== undefined && appOptions.canLiveView && (licType===Asc.c_oLicenseResult.ConnectionsLive || licType===Asc.c_oLicenseResult.ConnectionsLiveOS))
+            this._state.licenseType = licType;
+
         if (this._isDocReady && this._state.licenseType)
             this.applyLicense();
     }
@@ -530,7 +536,13 @@ class MainController extends Component {
             return;
         }
 
-        if (this._state.licenseType) {
+        if (appOptions.config.mode === 'view') {
+            if (appOptions.canLiveView && (this._state.licenseType===Asc.c_oLicenseResult.ConnectionsLive || this._state.licenseType===Asc.c_oLicenseResult.ConnectionsLiveOS)) {
+                appOptions.canLiveView = false;
+                this.api.asc_SetFastCollaborative(false);
+            }
+            Common.Notifications.trigger('toolbar:activatecontrols');
+        } else if (this._state.licenseType) {
             let license = this._state.licenseType;
             let buttons = [{text: 'OK'}];
             if ((appOptions.trialMode & Asc.c_oLicenseMode.Limited) !== 0 &&
@@ -598,7 +610,8 @@ class MainController extends Component {
     }
 
     onUpdateVersion (callback) {
-        const _t = this._t;
+        const { t } = this.props;
+        const _t = t('Controller.Main', {returnObjects:true});
 
         this.needToUpdateVersion = true;
         Common.Notifications.trigger('preloader:endAction', Asc.c_oAscAsyncActionType['BlockInteraction'], this.LoadingDocument);
@@ -617,7 +630,8 @@ class MainController extends Component {
 
     onServerVersion (buildVersion) {
         if (this.changeServerVersion) return true;
-        const _t = this._t;
+        const { t } = this.props;
+        const _t = t('Controller.Main', {returnObjects:true});
 
         if (About.appVersion() !== buildVersion && !window.compareVersions) {
             this.changeServerVersion = true;
@@ -765,7 +779,8 @@ class MainController extends Component {
             if (value === 1) {
                 this.api.asc_runAutostartMacroses();
             } else if (value === 0) {
-                const _t = this._t;
+                const { t } = this.props;
+                const _t = t('Controller.Main', {returnObjects:true});
                 f7.dialog.create({
                     title: _t.notcriticalErrorTitle,
                     text: _t.textHasMacros,
@@ -807,7 +822,8 @@ class MainController extends Component {
         this.api.asc_OnSaveEnd(data.result);
 
         if (data && data.result === false) {
-            const _t = this._t;
+            const { t } = this.props;
+            const _t = t('Controller.Main', {returnObjects:true});
             f7.dialog.alert(
                 (!data.message) ? _t.errorProcessSaveResult : data.message,
                 _t.criticalErrorTitle
@@ -824,7 +840,8 @@ class MainController extends Component {
             Common.Notifications.trigger('api:disconnect');
 
             if (!old_rights) {
-                const _t = this._t;
+                const { t } = this.props;
+                const _t = t('Controller.Main', {returnObjects:true});
                 f7.dialog.alert(
                     (!data.message) ? _t.warnProcessRightsChange : data.message,
                     _t.notcriticalErrorTitle,
diff --git a/apps/presentationeditor/mobile/src/store/appOptions.js b/apps/presentationeditor/mobile/src/store/appOptions.js
index 97b83a381..8b187331b 100644
--- a/apps/presentationeditor/mobile/src/store/appOptions.js
+++ b/apps/presentationeditor/mobile/src/store/appOptions.js
@@ -116,5 +116,7 @@ export class storeAppOptions {
         this.canUseReviewPermissions && AscCommon.UserInfoParser.setReviewPermissions(permissions.reviewGroups, this.customization.reviewPermissions);
         this.canUseCommentPermissions && AscCommon.UserInfoParser.setCommentPermissions(permissions.commentGroups);
         this.canUseUserInfoPermissions && AscCommon.UserInfoParser.setUserInfoPermissions(permissions.userInfoGroups);
+
+        this.canLiveView = !!params.asc_getLiveViewerSupport() && (this.config.mode === 'view') && isSupportEditFeature;
     }
 }
\ No newline at end of file
diff --git a/apps/spreadsheeteditor/mobile/src/controller/Main.jsx b/apps/spreadsheeteditor/mobile/src/controller/Main.jsx
index 76ab31109..a0d59fba0 100644
--- a/apps/spreadsheeteditor/mobile/src/controller/Main.jsx
+++ b/apps/spreadsheeteditor/mobile/src/controller/Main.jsx
@@ -91,7 +91,8 @@ class MainController extends Component {
             };
 
             const loadConfig = data => {
-                const _t = this._t;
+                const { t } = this.props;
+                const _t = t('Controller.Main', {returnObjects:true});
 
                 EditorUIController.isSupportEditFeature();
 
@@ -171,11 +172,10 @@ class MainController extends Component {
                     docInfo.put_Lang(this.editorConfig.lang);
                     docInfo.put_Mode(this.editorConfig.mode);
 
-                    // var coEditMode = !(this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object') ? 'fast' : // fast by default
-                    //     this.editorConfig.mode === 'view' && this.editorConfig.coEditing.change!==false ? 'fast' : // if can change mode in viewer - set fast for using live viewer
-                    //         this.editorConfig.coEditing.mode || 'fast';
-                    // docInfo.put_CoEditingMode(coEditMode);
-                    docInfo.put_CoEditingMode('strict'); // need to change!!!
+                    let coEditMode = !(this.editorConfig.coEditing && typeof this.editorConfig.coEditing == 'object') ? 'fast' : // fast by default
+                                    this.editorConfig.mode === 'view' && this.editorConfig.coEditing.change!==false ? 'fast' : // if can change mode in viewer - set fast for using live viewer
+                                    this.editorConfig.coEditing.mode || 'fast';
+                    docInfo.put_CoEditingMode(coEditMode);
 
                     const appOptions = this.props.storeAppOptions;
                     let enable = !appOptions.customization || (appOptions.customization.macros !== false);
@@ -622,6 +622,9 @@ class MainController extends Component {
                 || licType === Asc.c_oLicenseResult.SuccessLimit && (appOptions.trialMode & Asc.c_oLicenseMode.Limited) !== 0))
             this._state.licenseType = licType;
 
+        if (licType !== undefined && appOptions.canLiveView && (licType===Asc.c_oLicenseResult.ConnectionsLive || licType===Asc.c_oLicenseResult.ConnectionsLiveOS))
+            this._state.licenseType = licType;
+
         if (this._isDocReady && this._state.licenseType)
             this.applyLicense();
     }
@@ -653,7 +656,13 @@ class MainController extends Component {
             return;
         }
 
-        if (this._state.licenseType) {
+        if (appOptions.config.mode === 'view') {
+            if (appOptions.canLiveView && (this._state.licenseType===Asc.c_oLicenseResult.ConnectionsLive || this._state.licenseType===Asc.c_oLicenseResult.ConnectionsLiveOS)) {
+                appOptions.canLiveView = false;
+                this.api.asc_SetFastCollaborative(false);
+            }
+            Common.Notifications.trigger('toolbar:activatecontrols');
+        } else if (this._state.licenseType) {
             let license = this._state.licenseType;
             let buttons = [{text: 'OK'}];
             if ((appOptions.trialMode & Asc.c_oLicenseMode.Limited) !== 0 &&
@@ -741,7 +750,8 @@ class MainController extends Component {
             if (value === 1) {
                 this.api.asc_runAutostartMacroses();
             } else if (value === 0) {
-                const _t = this._t;
+                const { t } = this.props;
+                const _t = t('Controller.Main', {returnObjects:true});
                 f7.dialog.create({
                     title: _t.notcriticalErrorTitle,
                     text: _t.textHasMacros,
@@ -788,7 +798,8 @@ class MainController extends Component {
     }
 
     onBeforeUnload () {
-        const _t = this._t;
+        const { t } = this.props;
+        const _t = t('Controller.Main', {returnObjects:true});
 
         LocalStorage.save();
 
@@ -810,7 +821,8 @@ class MainController extends Component {
     }
 
     onUpdateVersion (callback) {
-        const _t = this._t;
+        const { t } = this.props;
+        const _t = t('Controller.Main', {returnObjects:true});
 
         this.needToUpdateVersion = true;
         Common.Notifications.trigger('preloader:endAction', Asc.c_oAscAsyncActionType['BlockInteraction'], this.LoadingDocument);
@@ -829,7 +841,8 @@ class MainController extends Component {
 
     onServerVersion (buildVersion) {
         if (this.changeServerVersion) return true;
-        const _t = this._t;
+        const { t } = this.props;
+        const _t = t('Controller.Main', {returnObjects:true});
 
         if (About.appVersion() !== buildVersion && !About.compareVersions()) {
             this.changeServerVersion = true;
@@ -915,7 +928,8 @@ class MainController extends Component {
         this.api.asc_OnSaveEnd(data.result);
 
         if (data && data.result === false) {
-            const _t = this._t;
+            const { t } = this.props;
+            const _t = t('Controller.Main', {returnObjects:true});
             f7.dialog.alert(
                 (!data.message) ? _t.errorProcessSaveResult : data.message,
                 _t.criticalErrorTitle
@@ -932,7 +946,8 @@ class MainController extends Component {
             Common.Notifications.trigger('api:disconnect');
 
             if (!old_rights) {
-                const _t = this._t;
+                const { t } = this.props;
+                const _t = t('Controller.Main', {returnObjects:true});
                 f7.dialog.alert(
                     (!data.message) ? _t.warnProcessRightsChange : data.message,
                     _t.notcriticalErrorTitle,
@@ -944,7 +959,9 @@ class MainController extends Component {
 
     onDownloadAs () {
         if ( this.props.storeAppOptions.canDownload) {
-            Common.Gateway.reportError(Asc.c_oAscError.ID.AccessDeny, this._t.errorAccessDeny);
+            const { t } = this.props;
+            const _t = t('Controller.Main', {returnObjects:true});
+            Common.Gateway.reportError(Asc.c_oAscError.ID.AccessDeny, _t.errorAccessDeny);
             return;
         }
         this._state.isFromGatewayDownloadAs = true;
diff --git a/apps/spreadsheeteditor/mobile/src/store/appOptions.js b/apps/spreadsheeteditor/mobile/src/store/appOptions.js
index cdecf77b8..e1dcf79c5 100644
--- a/apps/spreadsheeteditor/mobile/src/store/appOptions.js
+++ b/apps/spreadsheeteditor/mobile/src/store/appOptions.js
@@ -111,5 +111,7 @@ export class storeAppOptions {
         this.canUseReviewPermissions && AscCommon.UserInfoParser.setReviewPermissions(permissions.reviewGroups, this.customization.reviewPermissions);
         this.canUseCommentPermissions && AscCommon.UserInfoParser.setCommentPermissions(permissions.commentGroups);  
         this.canUseUserInfoPermissions && AscCommon.UserInfoParser.setUserInfoPermissions(permissions.userInfoGroups);
+
+        this.canLiveView = !!params.asc_getLiveViewerSupport() && (this.config.mode === 'view') && isSupportEditFeature;
     }
 }
\ No newline at end of file