1. *#06# on phone for IMEI
2. #0000# to see what software the phone has on screen of phone
3. When storing numbers always enter the international code (00353 Ireland) so you can make calls easier when abroad.
4. 0000 is the standard password for your O2 voice mail.
5. To change your voicemail message quickly call 172
6. To change your voicemail password call 173
7. The standard Nokia security code is 12345
8. Press and hold 0 on newer Nokia phone will get you straight into WAP
9. The model of your Nokia phone is written on the top right hand corner of the warranty sticker under the battery.
10. You can check you contract balance on screen for Free-Press *101#send
11. Place a 5 between the 086 and the rest of your mobile number to go into your voice mail direct from a landline.
12. Extend ringing time **61*0865(Number)**30#send
13. To check your spend on your O2 a/c dial *100#send
14. **004*0865xxxxxxx# send to reactivate voicemail.

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