Instructions to restart, unfreeze or unblock BSNL devices

How to reboot, unfreeze, unblock, or unlock a BSNL brand device without losing personal data, documents, photos, settings and device content. Do a "soft reset" if your device has been frozen in an application and is not responding. Find your device model and find the steps to restart it without losing information, be it a mobile phone, tablet, smart watch or activity bracelet.

BSNL Champion SM3512 BSNL Champion SM3512
BSNL Champion Penta PS650 BSNL Champion Penta PS650
BSNL Champion PS501 BSNL Champion PS501