Does anyone come across to this b4? the owners manual says a micro SD up to 8gb is supported, but doent mention that supports the new MicroSDHC, rang tmobile and reckon to be safe only get the 4GB, has anyone actually ised a 8gb card? and also I have noticed theres 2 types, one microSDHC and the same but "ultrafast" or smthing type, can anyone help before I buy the memory? many thanks