Sony Ericsson F305 Betriebsanweisung

36

Some problems require you to call your network operator. For 
more support go to www.sonyericsson.com/support.

Master reset

If you experience problems with your phone, such as screen 
flickering, screen freezing or navigation problems, you should 
reset the phone. If you select 

, all user data such as 

contacts, messages, pictures and sounds are deleted.

To reset all settings

•

From standby select 

 > the 

 tab 

> 

Error messages

You have entered your PIN code incorrectly three times in a row. 
Your SIM is now locked. Unlock your SIM with your PUK code, 
which is provided together with your PIN code by your network 
operator.

To unlock the SIM card

1

Enter your PUK code and select 

2

Enter a new PIN and select 

.

3

Re-enter the new PIN and select 

There is no SIM card in your phone or you may have inserted 
it incorrectly. Try one or more of the following:

•

Remove the SIM card and insert it correctly.

•

Clean the connectors on the SIM card and phone with a soft 
brush, a cloth or a cotton bud.