Nokia c2-00 Service Manual page 52

RM-704
BB Troubleshooting and Manual Tuning Guide
Figure 18 SIM voltages, no ATR
SIM card rejected
The error "SIM card rejected" means that the ATR message received from SIM card is corrupted, e.g. data
signal levels are wrong. The first data is always ATR and it is sent from card to phone. For reference a picture
with normal SIM power-up is shown below.
Figure 19 SIM voltages, normal startup at 3V
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