What should I do if I can't send text messages after Samsung I938root?

About the ROOT problem of Samsung mobile phone:

1. Samsung mobile phone can access and modify almost all files in the mobile phone operating system through third-party software, but this operation may affect the stability of the mobile phone and cause human-induced failures such as crash and restart.

in addition, obtaining the permission will generally cause defects to the main components on the motherboard such as memory and CPU.

2. Root belongs to modifying the operating system software, which is not covered by the warranty according to the regulations. In order to improve customer satisfaction, Samsung provides free firmware upgrade service to Root customers. If Root has affected the hardware of mobile phones and needs to replace the motherboard, it needs to charge the motherboard fee

3. If the machine needs to be restored to the original system version after Root, please send the machine to Samsung Service Center for inspection and handling by after-sales engineers. It is impossible to cancel the Root permission by restoring the device to the factory settings by itself.