The reason you CANNOT change the op-logo on a
GSM phone is because of its technology...
CDMA you can change the banner because you will never roam and if you do it will flash "partner parnter im charging you 1.50 a min!!!!!". With
GSM it will always tell you what network you are on for you. You must know if you are roaming or not. Even if you drive a copple of miles away from the border you may regester on a US network and you MUST KNOW YOU ARE ROAMING ON THE US NETWORK OR YOU WILL NOT KNOW WHY YOU WERE CHARGED. expecialy with robbers roaming rates. its the way it goes tough.