Does cingular have the sidekick phones?
HI whether you want to use cingular sim card in sidekick phone then you must first check that whether the phone is locked or unlocked one ..If the sidekick phone is locked to some other network then until you unlock your phone you can’t freely use it with cingular sim card ..If you want to unlock your sidekick phone from network lock then have a look at sites like here they render unlock code for all mobile models at reliable cost ….
Cingular does not offer it, but MOST OF THE TIME, if you buy an UNLOCKED Sidekick 3, you can put your Cingular SIM Card into the Sidekick, but you have to make sure you have the unlimited data plan with Cingular. Cingular people will help you out with it. If not, threaten and say you’ll go with T-Mobile.
