What is a SIM-Free Cell Phone?
Hi unlocked/sim free cell phone is nothing but the phone is free to any GSM sim in any countries ..Usually phone comes locked with one network provider due to this they can’t be used with other network sim until you unlock it ..There are many ways available to unlock mobile they are by using cable ,code ,software and so on among them code is the best ..There are many provides available online like UnBBLock.com here they are rendering network unlock code for all blackberry mobile models at reliable cost .Else if you want unlock some other mobile model then visit sites like Unlock-Zone.com here they are rendering network unlock code for all mobile models at reliable cost ..
Contextually SIM-free could mean exactly that – however some phones in the US are actually “SIM free” – as in, they do not require a SIM card to work. Sprint and Verizon devices use CDMA technology rather than GSM technology and do NOT need a SIM to work. Since GSM technology is more prevalent world wide however, both Sprint and Verizon are now making “world edition phones” which include a slot for a SIM card in case the user wants to travel internationally – but this does not mean you can use that device on AT&T or T-Mobile — it just allows you to roam on GSM networks overseas. So basically, a CDMA device with no SIM card will not work on networks like AT&T and T-Mobile, and conversely GSM devices generally do not work on networks like Verizon and Sprint. Hope this helps!
