No signal on nokia 6710

http://www.hard-reset.com/nokia-6710-navigator-hard-reset.html

is the sim card in the phone, a working sim card?

best way to reset security code is update your phones firmware by using nokia software updator
download it from nokia.com(only latest version)
gud luck

Your Nokia phone will see 802.11 b/g signals. Is your home access point broadcasting one of these?

It is a malware attack on your phone.Please reset you phone by entering *#7370# on your phone and press YES to set your phone to factory defaults.Please don't forget to copy your contacts to your SIM card or back up using PC Suite before proceeding. Hope you are satisfied with my solution.Your valuable feedback would be appreciated.Thanks for choosing Fixya.

TinuAlbinAlex

iF you forgot your password to unlock your phone you can do a hard reset or if you dont want to loose your personal information you can try doing soft reset:

To hard reset your Nokia 6710 Navigator you just have to press *#7370# and press Dial. The phone will request the security code that is by default 12345. Please be aware that you will loose all the data in your phone, so you should backup all relevant information.

If you want to soft reset your Nokia 6710 Navigator you need to press *#7780# and then Dial. The security code is 12345. Once you complete this, your phone will come back to factory settings, but you will not loose personal data. Anyway it is recommended to make a backup before performing any of the mentioned procedures.

GOOD LUCK

To unlock your Nokia 6710 phone you need to follow the instructions given below:
1 - Switch on your Nokia 6710 Navigation without any sim card.
2 - Don't bother as to what is displayed on your Nokia 6710 Navigation.
3 - Compose #pw+CODE+1#.
4 - The Nokia 6710 Navigation would then display the message "SIM Restriction Off" and will be unlocked!

I used the site http://www.wickedunlock.com/ which has a nearly perfect with google checkout and they were recommended highly in the cell phone forums. I contacted them and within 30 mins i had my unlock code and my phone was unlocked.
Hope this helps.

joao its a portuguese name have you try the normal codes like 1234 or 12345 ?

Nokia website offers specific pc suite for specific phones. downloading the specific pc suite for ur model will solve the problem.

id go to the repair tech section on fixya and ask them