[General Questions and Answers] D4Dabe:
The title describes the problem. I've done factory reset. I've done hard reset via recovery! I've flashed different roms. I've flashed factory rom via the phones default flash method. I've done everything. Device: Huawei y300 (u8833)

Here's the logcat.... Enjoy! :eek:

--------- beginning of /dev/log/main
F/NetworkStatsRecorder( 527): problem persisting pending stats
F/NetworkStatsRecorder( 527): java.io.FileNotFoundException: /data/system/netstats/dev.1457430526203-: open failed: EROFS (Read-only file system)
F/NetworkStatsRecorder( 527):	at libcore.io.IoBridge.open(IoBridge.java:409)
F/NetworkStatsRecorder( 527):	at java.io.FileOutputStream.<init>(FileOutputStream.java:88)
F/NetworkStatsRecorder( 527):	at java.io.FileOutputStream.<init>(FileOutputStream.java:73)
F/NetworkStatsRecorder( 527):	at com.android.internal.util.FileRotator.writeFile(FileRotator.java:374)
F/NetworkStatsRecorder( 527):	at com.android.internal.util.FileRotator.rewriteSingle(FileRotator.java:252)
F/NetworkStatsRecorder( 527):	at com.android.internal.util.FileRotator.rewriteActive(FileRotator.java:184)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsRecorder.forcePersistLocked(NetworkStatsRecorder.java:226)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsRecorder.maybePersistLocked(NetworkStatsRecorder.java:213)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsService.performPollLocked(NetworkStatsService.java:1005)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsService.performPoll(NetworkStatsService.java:952)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsService.access$700(NetworkStatsService.java:139)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsService$3.onReceive(NetworkStatsService.java:729)
F/NetworkStatsRecorder( 527):	at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:766)
F/NetworkStatsRecorder( 527):	at android.os.Handler.handleCallback(Handler.java:733)
F/NetworkStatsRecorder( 527):	at android.os.Handler.dispatchMessage(Handler.java:95)
F/NetworkStatsRecorder( 527):	at android.os.Looper.loop(Looper.java:136)
F/NetworkStatsRecorder( 527):	at android.os.HandlerThread.run(HandlerThread.java:61)
F/NetworkStatsRecorder( 527): Caused by: libcore.io.ErrnoException: open failed: EROFS (Read-only file system)
F/NetworkStatsRecorder( 527):	at libcore.io.Posix.open(Native Method)
F/NetworkStatsRecorder( 527):	at libcore.io.BlockGuardOs.open(BlockGuardOs.java:110)
F/NetworkStatsRecorder( 527):	at libcore.io.IoBridge.open(IoBridge.java:393)
F/NetworkStatsRecorder( 527):	... 16 more
E/WifiStateMachine( 527): Unexpected BatchedScanResults :eek:K
E/Sensors ( 527): sensors_poll_context_t::pollEvents, line 202: receive event #### i=3, nb=1
E/SharedPreferencesImpl( 1134): Couldn't rename file /data/data/com.google.android.backuptransport/shared_prefs/BackupTransport.backupScheduler.xml to backup file /data/data/com.google.android.backuptransport/shared_prefs/BackupTransport.backupScheduler.xml.bak
W/lights ( 527): TP Button Light current value is 0
W/lights ( 527): button_backlight:property_get,percent =0
E/Sensors ( 527): sensors_poll_context_t::pollEvents, line 202: receive event #### i=3, nb=1
E/Sensors ( 527): sensors_poll_context_t::pollEvents, line 202: receive event #### i=3, nb=1
F/NetworkStatsRecorder( 527): problem persisting pending stats
F/NetworkStatsRecorder( 527): java.io.FileNotFoundException: /data/system/netstats/dev.1457430526203-: open failed: EROFS (Read-only file system)
F/NetworkStatsRecorder( 527):	at libcore.io.IoBridge.open(IoBridge.java:409)
F/NetworkStatsRecorder( 527):	at java.io.FileOutputStream.<init>(FileOutputStream.java:88)
F/NetworkStatsRecorder( 527):	at java.io.FileOutputStream.<init>(FileOutputStream.java:73)
F/NetworkStatsRecorder( 527):	at com.android.internal.util.FileRotator.writeFile(FileRotator.java:374)
F/NetworkStatsRecorder( 527):	at com.android.internal.util.FileRotator.rewriteSingle(FileRotator.java:252)
F/NetworkStatsRecorder( 527):	at com.android.internal.util.FileRotator.rewriteActive(FileRotator.java:184)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsRecorder.forcePersistLocked(NetworkStatsRecorder.java:226)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsRecorder.maybePersistLocked(NetworkStatsRecorder.java:213)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsService.performPollLocked(NetworkStatsService.java:1005)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsService.updateIfacesLocked(NetworkStatsService.java:875)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsService.updateIfaces(NetworkStatsService.java:852)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsService.access$600(NetworkStatsService.java:139)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsService$2.onReceive(NetworkStatsService.java:717)
F/NetworkStatsRecorder( 527):	at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:766)
F/NetworkStatsRecorder( 527):	at android.os.Handler.handleCallback(Handler.java:733)
F/NetworkStatsRecorder( 527):	at android.os.Handler.dispatchMessage(Handler.java:95)
F/NetworkStatsRecorder( 527):	at android.os.Looper.loop(Looper.java:136)
F/NetworkStatsRecorder( 527):	at android.os.HandlerThread.run(HandlerThread.java:61)
F/NetworkStatsRecorder( 527): Caused by: libcore.io.ErrnoException: open failed: EROFS (Read-only file system)
F/NetworkStatsRecorder( 527):	at libcore.io.Posix.open(Native Method)
F/NetworkStatsRecorder( 527):	at libcore.io.BlockGuardOs.open(BlockGuardOs.java:110)
F/NetworkStatsRecorder( 527):	at libcore.io.IoBridge.open(IoBridge.java:393)
F/NetworkStatsRecorder( 527):	... 17 more
F/NetworkStatsRecorder( 527): problem persisting pending stats
F/NetworkStatsRecorder( 527): java.io.FileNotFoundException: /data/system/netstats/dev.1457430526203-: open failed: EROFS (Read-only file system)
F/NetworkStatsRecorder( 527):	at libcore.io.IoBridge.open(IoBridge.java:409)
F/NetworkStatsRecorder( 527):	at java.io.FileOutputStream.<init>(FileOutputStream.java:88)
F/NetworkStatsRecorder( 527):	at java.io.FileOutputStream.<init>(FileOutputStream.java:73)
F/NetworkStatsRecorder( 527):	at com.android.internal.util.FileRotator.writeFile(FileRotator.java:374)
F/NetworkStatsRecorder( 527):	at com.android.internal.util.FileRotator.rewriteSingle(FileRotator.java:252)
F/NetworkStatsRecorder( 527):	at com.android.internal.util.FileRotator.rewriteActive(FileRotator.java:184)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsRecorder.forcePersistLocked(NetworkStatsRecorder.java:226)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsRecorder.maybePersistLocked(NetworkStatsRecorder.java:213)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsService.advisePersistThreshold(NetworkStatsService.java:684)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkPolicyManagerService$13.handleMessage(NetworkPolicyManagerService.java:1976)
F/NetworkStatsRecorder( 527):	at android.os.Handler.dispatchMessage(Handler.java:98)
F/NetworkStatsRecorder( 527):	at android.os.Looper.loop(Looper.java:136)
F/NetworkStatsRecorder( 527):	at android.os.HandlerThread.run(HandlerThread.java:61)
F/NetworkStatsRecorder( 527): Caused by: libcore.io.ErrnoException: open failed: EROFS (Read-only file system)
F/NetworkStatsRecorder( 527):	at libcore.io.Posix.open(Native Method)
F/NetworkStatsRecorder( 527):	at libcore.io.BlockGuardOs.open(BlockGuardOs.java:110)
F/NetworkStatsRecorder( 527):	at libcore.io.IoBridge.open(IoBridge.java:393)
F/NetworkStatsRecorder( 527):	... 12 more
F/NetworkStatsRecorder( 527): problem persisting pending stats
F/NetworkStatsRecorder( 527): java.io.FileNotFoundException: /data/system/netstats/dev.1457430526203-: open failed: EROFS (Read-only file system)
F/NetworkStatsRecorder( 527):	at libcore.io.IoBridge.open(IoBridge.java:409)
F/NetworkStatsRecorder( 527):	at java.io.FileOutputStream.<init>(FileOutputStream.java:88)
F/NetworkStatsRecorder( 527):	at java.io.FileOutputStream.<init>(FileOutputStream.java:73)
F/NetworkStatsRecorder( 527):	at com.android.internal.util.FileRotator.writeFile(FileRotator.java:374)
F/NetworkStatsRecorder( 527):	at com.android.internal.util.FileRotator.rewriteSingle(FileRotator.java:252)
F/NetworkStatsRecorder( 527):	at com.android.internal.util.FileRotator.rewriteActive(FileRotator.java:184)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsRecorder.forcePersistLocked(NetworkStatsRecorder.java:226)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsRecorder.maybePersistLocked(NetworkStatsRecorder.java:213)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsService.performPollLocked(NetworkStatsService.java:1005)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsService.updateIfacesLocked(NetworkStatsService.java:875)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsService.updateIfaces(NetworkStatsService.java:852)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsService.access$600(NetworkStatsService.java:139)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsService$2.onReceive(NetworkStatsService.java:717)
F/NetworkStatsRecorder( 527):	at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:766)
F/NetworkStatsRecorder( 527):	at android.os.Handler.handleCallback(Handler.java:733)
F/NetworkStatsRecorder( 527):	at android.os.Handler.dispatchMessage(Handler.java:95)
F/NetworkStatsRecorder( 527):	at android.os.Looper.loop(Looper.java:136)
F/NetworkStatsRecorder( 527):	at android.os.HandlerThread.run(HandlerThread.java:61)
F/NetworkStatsRecorder( 527): Caused by: libcore.io.ErrnoException: open failed: EROFS (Read-only file system)
F/NetworkStatsRecorder( 527):	at libcore.io.Posix.open(Native Method)
F/NetworkStatsRecorder( 527):	at libcore.io.BlockGuardOs.open(BlockGuardOs.java:110)
F/NetworkStatsRecorder( 527):	at libcore.io.IoBridge.open(IoBridge.java:393)
F/NetworkStatsRecorder( 527):	... 17 more
F/NetworkStatsRecorder( 527): problem persisting pending stats
F/NetworkStatsRecorder( 527): java.io.FileNotFoundException: /data/system/netstats/dev.1457430526203-: open failed: EROFS (Read-only file system)
F/NetworkStatsRecorder( 527):	at libcore.io.IoBridge.open(IoBridge.java:409)
F/NetworkStatsRecorder( 527):	at java.io.FileOutputStream.<init>(FileOutputStream.java:88)
F/NetworkStatsRecorder( 527):	at java.io.FileOutputStream.<init>(FileOutputStream.java:73)
F/NetworkStatsRecorder( 527):	at com.android.internal.util.FileRotator.writeFile(FileRotator.java:374)
F/NetworkStatsRecorder( 527):	at com.android.internal.util.FileRotator.rewriteSingle(FileRotator.java:252)
F/NetworkStatsRecorder( 527):	at com.android.internal.util.FileRotator.rewriteActive(FileRotator.java:184)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsRecorder.forcePersistLocked(NetworkStatsRecorder.java:226)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsRecorder.maybePersistLocked(NetworkStatsRecorder.java:213)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkStatsService.advisePersistThreshold(NetworkStatsService.java:684)
F/NetworkStatsRecorder( 527):	at com.android.server.net.NetworkPolicyManagerService$13.handleMessage(NetworkPolicyManagerService.java:1976)
F/NetworkStatsRecorder( 527):	at android.os.Handler.dispatchMessage(Handler.java:98)
F/NetworkStatsRecorder( 527):	at android.os.Looper.loop(Looper.java:136)
F/NetworkStatsRecorder( 527):	at android.os.HandlerThread.run(HandlerThread.java:61)
F/NetworkStatsRecorder( 527): Caused by: libcore.io.ErrnoException: open failed: EROFS (Read-only file system)
F/NetworkStatsRecorder( 527):	at libcore.io.Posix.open(Native Method)
F/NetworkStatsRecorder( 527):	at libcore.io.BlockGuardOs.open(BlockGuardOs.java:110)
F/NetworkStatsRecorder( 527):	at libcore.io.IoBridge.open(IoBridge.java:393)
F/NetworkStatsRecorder( 527):	... 12 more
E/Sensors ( 527): sensors_poll_context_t::pollEvents, line 202: receive event #### i=3, nb=1
E/Sensors ( 527): sensors_poll_context_t::pollEvents, line 202: receive event #### i=3, nb=1
E/SharedPreferencesImpl( 1134): Couldn't rename file /data/data/com.google.android.backuptransport/shared_prefs/BackupTransport.backupScheduler.xml to backup file /data/data/com.google.android.backuptransport/shared_prefs/BackupTransport.backupScheduler.xml.bak
E/Sensors ( 527): sensors_poll_context_t::pollEvents, line 202: receive event #### i=3, nb=1
E/Sensors ( 527): sensors_poll_context_t::pollEvents, line 202: receive event #### i=3, nb=1
E/Sensors ( 527): sensors_poll_context_t::pollEvents, line 202: receive event #### i=3, nb=1
E/Sensors ( 527): sensors_poll_context_t::pollEvents, line 202: receive event #### i=3, nb=1
E/Sensors ( 527): sensors_poll_context_t::pollEvents, line 202: receive event #### i=3, nb=1
E/Sensors ( 527): sensors_poll_context_t::pollEvents, line 202: receive event #### i=3, nb=1
E/Sensors ( 527): sensors_poll_context_t::pollEvents, line 202: receive event #### i=3, nb=1
E/Sensors ( 527): sensors_poll_context_t::pollEvents, line 202: receive event #### i=3, nb=1
E/Sensors ( 527): sensors_poll_context_t::pollEvents, line 202: receive event #### i=3, nb=1
E/Sensors ( 527): sensors_poll_context_t::pollEvents, line 202: receive event #### i=3, nb=1
E/Sensors ( 527): sensors_poll_context_t::pollEvents, line 202: receive event #### i=3, nb=1
E/Sensors ( 527): sensors_poll_context_t::pollEvents, line 202: receive event #### i=3, nb=1

The whole log: http://pastebin.com/kWBfXWmj