Where can i buy a mobile phone that has no restrictions on SIM card?

What you are looking for is an "unlocked" cell phone. SIM cards are used by GSM phones such as those used by AT&T and T-Mobile. Most countries have standardized on GSM and so you will find that most European and Asian cell phones are GSM phones and can be made to work on GSM networks in America with the right SIM card. Virtually any popular model of cell phone in America can be found online unlocked. Be warned however that often this process has been done by a thrid party and these phones will come with little to no warranty available. A brand new unlocked phone shipped directly from the manufacturer or a reseller will be very expensive because the cell phones you get by signing a contract with your carrier are subsidized by your monthly bills. Ever noticed that prepaid cell phone service is often cheaper but the phones cost a lot more? Thats why. Good places to look for new unlocked phones are Amazon, Cellhut, and Newegg. I've listed a few popular choices below. Thank you for using IMshopping.