The Ericcson T29 is a older model. There are several itmes which pop up into my mind :
1) Did you insert a SIM-card ?
If you don't insert a SIM-card, the phone doesn't know to which provider-network it should connect.
2) Does your phone get acces to the frequency your provider is active ?
Your mobile phone is more or less like a walky-talky, operating at a certain frequency. For GSM it can be 850, 900, 1800 or even 1900 MHz. Lets assume, your provider operates at 1900 MHz, but your phone can only be active in the 850MHz-range, you got a communicationproblem. The phone can't connect to the provider. I think this might be the case with your mobile phone, because the T29 is quite some years old.
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