I have a Siemens AX72 (http://sota1.ru/model_tables/modelde...mens_ax72.php3)on Virgin.I want to use it on T-Mobile.I know it works on T-Mobile as I have put a sim in.When the phone has finished turning on there is a Virgin logo with Virgin(in small lettering)above it.This changes to T-Mobile with that sim.My question is;can I erase/turn off the Virgin Logo? I have been through the menu and can't find anyway of doing it.Thanks............