Pls guys help me,my phone is hanging, especially wen am typin wit gboard on WhatsApp,i use samsung s3

Wipe it.
You probably have much applications running.

MistadeRegal:
Wipe it.
You probably have much applications running.

thanks bro,i tink av gtn d solution

You can do a hard reset to restore your device's factory settings like here https://www.unlockunit.com/help/knowledgebase/hard-reset-samsung/

A factory reset is simply the restoration of a device to the state it was in when leaving the factory. Is like having a brand new device.

The only CON is that you will have to install most of the third-party apps.