Originally Posted by iamsaikotic
Wind and Mobilicity use AWS (1700/2100) which is another form of GSM.
Their phones can work with each other's networks and T-Mobile also has phones that work with AWS.
All you have to do is look at the box or ask the person you're buying it from if it has the frequencies you need and make sure it's a 3G phone.
If you use a 3G or 4G T-Mobile blackberry on Rogers, Bell, Telus, Fido or Chatr you will only get 2G speeds because of the difference in networks.
A sim card at Wind is $25 and I believe Mobilicty is the same.
Pulic Mobile uses CDMA and will not work with GSM.