Help Vibrant - Not Registered on Network

[stanrucker]

Hi,
I have A T-Mobile Samsung Vibrant on GT-I9000. When I start it, it just says that I am not registered on the network. I have called T-mobile they have not been able to help due to poor customer service. I am not sure what to do . Please help

 

[Northerndj]

Try this
Go in to settings > Wireless and networks > mobile networks make sure the top option use pacet data is ticked then look at network mode set that to auto then press network operators it will do a search and show you what networks are available pick t Mobile and the phone will log you back on to there network if it does not see T Mobile then you have a faulty simm if you have a simm