Currently Being ModeratedMay 17, 2012 9:55 AM (in response to Gareth Bayard)
do a reset, hold down the home/power button together until you see the apple logo and then release, then wait for the phone to boot back up.
When does your phone freeze? using an app?
Currently Being ModeratedMay 17, 2012 10:01 AM (in response to Gareth Bayard)
If a reset doesn't help, try these steps as needed, as described in the User Guide, Appendix B:
1. Settings > General > Reset > Reset All Settings
2. Restore phone in iTunes using a backup
3. Restore phone in iTunes as new, without using a backup.
If restoring as new doesn't help, there is a hardware problem in the phone.