HTC DESIRE: Can't access data except through Wifi

[Chuck_Vindaloo]

Not sure what's going on. I've unlocked the Telus version of the Desire and I'm now using a SIM card on the Bell network. However, the only way that I can access data is through WiFi. When it is turned off I can't access emails or the internet yet my data plan is working and Bell has input my IMEI into their system.

Is this a hardware issue?

 

[Bunjiweb]

Have u changed the Apn settings to that of bell rather than tellus?

 

[lefsucon335]

how do you change the apn settings to bell rather than telus?