Here are the American carriers:
And here are some of the major international carriers:
**the international carriers may not be available in the country of your choice
You don't need to be jailbroken now that the iPhone supports most carriers. The iPhone 4 is physically unable to switch from GSM to CDMA carriers anway.
The Work on some Different Carriers.
The iPhone 3GS is only available on AT&T, but newer models are available on more carriers.
If you are buying and iPhone in Canada, the iPhone supports the following carriers:BellMTSFidoRogersTelusVirgin MobileSasktelKoodoIf you are only traveling, you can purchase a Nano SIM card (if your iPhone is unlocked) from whichever carriers support them.
If your iPhone is unlocked, then yes, all carriers will work. But if it is locked to a certain carrier, then you will have to unlock it using a jailbreak.
I don't believe any carriers still sell the iPhone 3GS or older, especially considering they offer the iPhone 4 now for free (with contract).
Right now you can get the iPhone through AT&T and T-Mobile. All you do is order a sim card and you can use T-Mobile on your iPhone. WHen it will be able through other carriers some people say will be in January when the iPhone goes to Verizon, and October when it goes to Sprint.
You can get an iPhone at the Apple store, through carriers, or online or "brick-and-mortar" retailers.
no, they are the exact same phone just with different carriers.
Here's a simple fix: SWITCH CARRIERS!!!!!!!!!
Probably not, because I don't think there are any carriers that the iPhone supports in Bangladesh.
There are a number of carriers who will sell you a prepaid iPhone. The monthly cost is about half the price of an iPhone on contract, but you will pay substantially more for the phone itself since you do not receive a subsidy in exchange for accepting a long-term contract. Also, you'll typically get an older-model iPhone when you buy a prepaid no-contract phone.