Nokia 5610 TIPS:

To view Software Version enter *#9999#

*#92772689# for checking ISDN number.
1) Serial No.
2) Made
3) Programming date
4) Repaired
5) Transfer user data ?
6) Life Timer

*3001#12345# for field test mode and nam selection and some other stuff...
1) NAM 1
a. Home System ID
b. Own Number
c. Alpha Tag
d. PSID/RSID lists
e. Change Defaults
2) NAM 2
a. Home System ID
b. Own Number
c. Alpha Tag
d. PSID/RSID lists
e. Change Defaults
3) Security a. Displays security code
4) Emergency
a. Emergency number 1
b. Emergency number 2
c. Emergency number 3
5) SW Version a. Displays sw version
6) Serial No. a. Displays ESN
7) Programmed
8) Field Test

*#639# to change NAM.

Free SMS Tip
1. turn our phone off.
2. turn it on and enter your pin.
3. enter *#746025625# 4. now "SIM CLOCK STOP ALLOWED" will be displayed.
now you can send sms for free. if you turn your phone off and later on you have to reenter this code!!