You need a "transition" firmware and the "final" global firmware.

Click start. The progress bar will move as it rewrites the internal memory partitions.

Before you begin, gather the following tools and files. You will need to search for these on Google or specialized GSM forums (like GSMHosting), as direct links to firmware files are often removed or expire.

For users seeking to use their B315s-607 with a different SIM card, the following safe methods are recommended:

In most countries, yes, it is legal to unlock a device you own for personal use. However, it will definitely void your manufacturer's warranty.

Unlocking any device carries inherent risks, and the B315s-607 is no exception. Before you begin, you should be fully aware of the potential consequences:

: Manually select specific LTE frequencies (like Band 3 or Band 40) to boost internet speeds. Prerequisites and Requirements

Walk you through the once you have unlocked it. Advise on compatible external antennas for better speed.

Wait for the command prompt or progress bar to reach 100%. Do not unplug the cable.