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just take the sim out and it works
no, you dont. you can jailbreak your iphone and run it on tmobile's network, if you have a tmobile sim card. but on tmobile, you cant have 3g speeds, only 2g.
You need one with a SIM Card slot. From there, find a GSM carrier, buy a SIM card and slip it in. (T-Mobile, AT&T, and every European carrier is GSM).
You will have to contact Airtel to convert your 2G phone to 3G. The same sim card can be used for both 2G and 3G, so you will not need to change to a new card.
You will have to contact Airtel to convert your 2G phone to 3G. The same sim card can be used for both 2G and 3G, so you will not need to change to a new card.
yes but it is slow it is in 2g speed only but it is better than the cost of 3g plans
well im not really sure it unjailbroke it BUT it still works on my ATT sim but im not sure if its supposed to work on the iphone or not since its not a normal ATT sim card with a normal rate its not an iphone plan but it still works on it i dunno bout bootloader