I have an Ascend Mate, locked to my carrier (Claro Guatemala), and I want to update my phone to the newest software via the update from SD card. Is there any issue or thing I need to know about this? I come from a Xperia Ray, and it was a bit different since you can flash a complete ROM there. Will I wipe all my data? And will the branding (uselss apps, icons from a lot of apps are different and dont change with the theme) dissapear?