Unlock HTC Tatoo

[lindaprice]

Hi
I have just purchased an unlock code from fastgsm.com for a HTC tattoo. Although when I entered it in phone and got message that network was unlocked successfully, when i try to use phone im told 'not registered on network'
Any ideas?
Linda

 

[unofficialitguy]

Does the SIM work in other phones? Do you have another SIM you could try in the phone (a friend's sim maybe?)