Mobile Phone Resources
From Indie IT Wiki
Changing Mobile Provider, PAC or STAC?
- If you want to keep your phone number, text PAC to 65075.
- If you do not want to keep your phone number, text STAC to 75075.
Both options are free and should result in a swift turn around in receiving your relevant code, further details can be found here.
GSM Arena - mobile phone reviews, news, specifications and more...
Checkmend - The world's most comprehensive device check
NMPR - The UK Police National Mobile Property Register
Will My Phone Work - Check if your phone works on a network
PhoneDB - Similar to GSM Arena