Unlock your Siemens mobile
Siemens - Together we'll make it talk
Many large networks like O2 or Vodafone always lock their phones, so you can only use it on their network, unless you desided to unlock your Siemens phone.
There are two ways that a phone can be unlocked. The first way is very simple by keying in a secret code into your phone. The code is a unique number only for that particular phone, based on its serial number (IMEI) and the service provider who locked it. The second method need firmware, operating system software to be rewritten to remove the lock.
Most of the time unblocking costs about £2-3 but it depends how lucky you are. Actually, you don't even need to pay for unlocking your Siemens phone. Just use calculator software that calculates free unlock code and enter it into your handset.
Be assured, unlocking as such is absolutely legal, but remember it is illegal to change the phone's IMEI (serial number).