Nokia 20 Manual Do Utilizador

©2001 Nokia Mobile Phones. All rights reserved.

For example, response 

+csq: 31, 99 

means that the signal strength is excellent.

If the signal is weaker than -95 dBm (the <rssi> parameter is 9 or less), move the terminal to another 
location. If the terminal does not receive a stronger signal, contact your service provider. Anexternal 
antenna may improve the reception.

If entering the PIN code fails three times successively, the code is blocked. You can unblock it by 
entering your PUK (Personal Unblocking Key) code. The PUK code may be supplied with the SIM card. If 
not, contact your local service provider for the code. If you lose the code, contact your service provider. 

When the PIN code is blocked, light indicators 3 and 4 blink.

 

To unblock the code, proceed as follows:

• In the HyperTerminal connection window, type the AT command 

at+cpin? 

and press ENTER. If 

the PUK code is required, the response is 

+cpin: SIM PUK.

• Enter the PUK code with the command 

at+cpin="PUK","PIN"

 where PUK is your PUK code and 

PIN your old or new PIN code. Press ENTER. 

If you do not get an 

OK

 response when you enter 

at

 in the HyperTerminal connection window, first 

check that the port settings are correct (see ”Figure 1. Port settings” on page 14).

It is also possible that your PC or software is incompatible with the terminal. Contact your PC and 
software dealers for advice.