What to do before flashing a new firmware

[crshNbrn]

What is the user suppose to do first before flashing a new firmware to make sure its a fully clean install.

[peety]

Backup

What is the user suppose to do firsdependentre flashing a new firmware to make sure its a fully clean install.

I hate it when no one will reply to a question. The tools that are supplied with any ROM you download will erase your device. If its firmware from where you bought it or the OEM. They will give you a link to the tool to use.
More important though is to back up your original. How is depending on your device. You will have to research it..Good luck.

[exglynco]

Read everything you can about your device. AFAIK, no one has developed a non-flickering non-OEM kernel for the J22, for instance. Also, you'll need to know how to get your device into Mask ROM mode.

As mentioned above, back up your ROM before installing a custom ROM. For 3188 devices, see the thread in the Development Area>ROM Hacks and Mods Development, Backing up our RK Device (ROM) with the New RK 2.1 Tool http://www.freaktab.com/showthread.p...ew-RK-2-1-tool