Checking Subscription and SIM Card Reader. Phone Module (PHM)

Checking Subscription And SIM-card Reader. Phone Module (PHM)

Fault-tracing Information







Phone module (PHM) has a SIM-card reader for the customer's private telephone subscription. The SIM-card reader is located at the top, on the left side inside the glove compartment. Sometimes the thickness of different network operators' SIM-cards may vary, which may result in the contact faces on the SIM-card not having contact with the SIM-card reader's contact in Phone module (PHM). This may be the cause of calls being cut off and that the telephone returns to basic mode.

If the customer has a twin card, an extra SIM card connected to the existing subscription, a comparison between the function of the cards must be carried out.

If the customer experiences reduced function at certain specific occasions/places, this can be due to poor local reception/coverage.

In cases where the customer has a subscription which does not work on more than one frequency, this can be a cause for the poor reception/coverage.

Check:
- that the mating surface of the SIM card is clean and that there are no dents in the mating surface
- that the SIM card is in the correct card holder
- the SIM card reader. Check for damage. Check for bent connectors
- the function using another SIM card/subscription.