Definitely do a backup using internal app. It's very handy to restore your apps settings and contacts.

Anyone can answer my question mentioned before?
What is the difference

Contract WAP
GPRS + Contract WAP
GPRS only

depend of numbers of flashing device

Do you have any issues with this?
Since I lost this labeled this way they might charge me for GPRS use?
Is not like vodafone cheating us with internet this way?

Thanks