hi
if you are from nigeria, i believe you can set up your gprs manually but due to some that do not know, i will start with zain settings. I will post for other countries too. Here it is:
account name: Zain NG
homepage: wap.ng.zain.com
user name: wap
password: wap
use preferred access point: no
ACCESS POINT SETTINGS
use proxy: yes
proxy address: 172.018.254.005
proxy port: 8080
BEARER SETTINGS
apn: wap.ng.zain.com or internet.ng.zain.com or admin.ng.zain.com
network type: IPV4
Authentication: normal
that is that for now. More is to come