diff --git a/frontend/ui/networkmgr.lua b/frontend/ui/networkmgr.lua
new file mode 100644
index 000000000..7fa9115d3
--- /dev/null
+++ b/frontend/ui/networkmgr.lua
@@ -0,0 +1,55 @@
+local ConfirmBox = require("ui/widget/confirmbox")
+local UIManager = require("ui/uimanager")
+local Device = require("ui/device")
+local DEBUG = require("dbg")
+local _ = require("gettext")
+
+local NetworkMgr = {}
+
+local function kindleEnableWifi(toggle)
+    local lipc = require("liblipclua")
+    local lipc_handle = nil
+    if lipc then
+        lipc_handle = lipc.init("com.github.koreader.networkmgr")
+    end
+    if lipc_handle then
+        lipc_handle:set_int_property("com.lab126.cmd", "wirelessEnable", toggle)
+        lipc_handle:close()
+    end
+end
+
+function NetworkMgr:turnOnWifi()
+    if Device:isKindle() then
+        kindleEnableWifi(1)
+    elseif Device:isKobo() then
+        -- TODO: turn on wifi on kobo?
+    end
+end
+
+function NetworkMgr:turnOffWifi()
+    if Device:isKindle() then
+        kindleEnableWifi(0)
+    elseif Device:isKobo() then
+        -- TODO: turn off wifi on kobo?
+    end
+end
+
+function NetworkMgr:promptWifiOn()
+    UIManager:show(ConfirmBox:new{
+        text = _("Do you want to Turn on Wifi?"),
+        ok_callback = function()
+            self:turnOnWifi()
+        end,
+    })
+end
+
+function NetworkMgr:promptWifiOff()
+    UIManager:show(ConfirmBox:new{
+        text = _("Do you want to Turn off Wifi?"),
+        ok_callback = function()
+            self:turnOffWifi()
+        end,
+    })
+end
+
+return NetworkMgr
diff --git a/koreader-base b/koreader-base
index 66b1bcf4f..43defcb8e 160000
--- a/koreader-base
+++ b/koreader-base
@@ -1 +1 @@
-Subproject commit 66b1bcf4f87f16598806445e6b437310411ffefc
+Subproject commit 43defcb8e00db8f78fed747a697e77983ba33819
diff --git a/plugins/evernote.koplugin/main.lua b/plugins/evernote.koplugin/main.lua
index aa95d49ff..c8a6ec9f6 100644
--- a/plugins/evernote.koplugin/main.lua
+++ b/plugins/evernote.koplugin/main.lua
@@ -2,6 +2,7 @@ local InputContainer = require("ui/widget/container/inputcontainer")
 local LoginDialog = require("ui/widget/logindialog")
 local InfoMessage = require("ui/widget/infomessage")
 local DocSettings = require("docsettings")
+local NetworkMgr = require("ui/networkmgr")
 local UIManager = require("ui/uimanager")
 local Screen = require("ui/screen")
 local Event = require("ui/event")
@@ -172,7 +173,11 @@ function EvernoteExporter:doLogin(username, password)
     }
     self.evernote_username = username
     local ok, token = pcall(oauth.getToken, oauth)
-    if not ok or not token then
+    -- prompt users to turn on Wifi if network is unreachable
+    if not ok and token and token:find("Network is unreachable") then
+        NetworkMgr:promptWifiOn()
+        return
+    elseif not ok and token then
         UIManager:show(InfoMessage:new{
             text = _("Error occurs when login:") .. "\n" .. token,
         })
@@ -184,11 +189,14 @@ function EvernoteExporter:doLogin(username, password)
         authToken = token,
     }
     local ok, guid = pcall(self.getExportNotebook, self, client)
-    if not ok or not guid then
+    if not ok and guid and guid:find("Transport not open") then
+        NetworkMgr:promptWifiOn()
+        return
+    elseif not ok and guid then
         UIManager:show(InfoMessage:new{
             text = _("Error occurs when login:") .. "\n" .. guid,
         })
-    elseif guid then
+    elseif ok and guid then
         self.evernote_token = token
         self.notebook_guid = guid
         UIManager:show(InfoMessage:new{
@@ -300,11 +308,14 @@ function EvernoteExporter:exportClippings(client, clippings)
             local ok, err = pcall(self.exportBooknotes, self,
                         client, title, booknotes)
             -- error reporting
-            if not ok then
+            if not ok and err and err:find("Transport not open") then
+                NetworkMgr:promptWifiOn()
+                return
+            elseif not ok and err then
                 DEBUG("Error occurs when exporting book:", title, err)
                 error_count = error_count + 1
                 error_title = title
-            else
+            elseif ok then
                 DEBUG("Exported notes in book:", title)
                 export_count = export_count + 1
                 export_title = title