The Phone Does Not Register To The Networks, Or The Phone Can Not Make A Call - Nokia RH-64 Service Manual

RH-64
Baseband troubleshooting Nokia Customer Care
Figure 84 Troubleshooting when the "Contact Service" message is seen

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

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 check that SIM LOCK is not causing the error by using a Test-SIM card and connect the phone to a tester.
9243363 (Issue 1) Company Confidential Page 6–11
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