I have had tried 3 other different sim cards and unfortunately no luck at all.
Please help if you know the solution, if i can get the firmware updated, that might help but i dunno why it cant get updated...
How to install the firmware to the Sony Ericsson P910i: 1.
For all of your data, a backup should be done on an external device, hard drive, raid system or media.
With or without insurance, if your cell phone lost, damaged or stolen at least your invaluable data is backed up in a safe place.
Also on our site - has video instruction on the Firmware Sony Ericsson P910i, to read it, go to the desired menu.
To download the firmware for the Sony Ericsson P910i you do not need to be registered on our site, we do it for free.