The Phone Does Not Register To The Networks, Or The Phone Can Not Make A Call - Nokia RH-99 Service Manual

RH-99; RH-100; RH-105; RH-106
Baseband troubleshooting
Figure 12 Troubleshooting when the "Contact Service" message is seen

The phone does not register to the networks, or the phone can not make a call

Troubleshooting flow
If the phone doesn't register to the network, the fault can be in either BB or RF. Only few signals can be tested
since several signals is 'buried' in one or more of the inner layers of the PWB.
First of all verify that SIM LOCK is not the reason to cause phone cannot connect to network. The way is to
check if the phone can connect to CMU200 by a test SIM card.
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