Try to replace apns-conf.xml file ver.2:
https://drive.google.com/open?id=0Bx5Fv74n-TBpcnFuREE2ang3cUE
Located here: /System/etc/apns-conf.xml
1. Download new linked apns-conf.xml to phone internal storage
2. Reboot to TWRP recovery > Tap on Mount > Untick "mount system partition read only" > Tick System > Back to TWRP main menu > Advanced > File Manager
3. Copy new apns-conf.xml file and paste to /system/etc/ folder overwrite the existing apns-conf.xml file
4. Reboot to system
Feedback please if it works or not...