Solution
Please consult your handset manual or manufacturers’ web site for the exact instructions as this varies from each handset model.

You may find the following contact telephone numbers useful in case of any problems with your handset settings:

Sony Ericsson – 08705 237 237
Motorola – 08709 010 555
Nokia – 01480 434 343
Samsung – 0870 242 0303
Siemens – 08705 334 411
Sagem – 020 7536 5400
LG – 0906 517 8832