Tartarus
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- Feb 20, 2014
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WWDC 2023 is coming on June 5 - Here is everything you need to know about the event!
Only a few countries use cdma, the rest is GSM indeed.
https://en.m.wikipedia.org/wiki/CDMA2000
USA, CANADA and who else?
CDMA2000 (also known as C2K or IMT Multi‑Carrier (IMT‑MC)) is a family of 3G[1] mobile technology standards for sending voice, data, and signaling data between mobile phones and cell sites. It is developed by 3GPP2 as a backwards-compatible successor to second-generation cdmaOne (IS-95) set of standards and used especially in North America and South Korea
FYI...there's a double edge sword with respect to full retail whether Verizon model or SIM Free Model.
The minute you put your SIM card in and activate the device, it WILL 100% be locked to the carrier who's SIM you use. This is because the law or lack thereof works both ways.
Carriers are legally allowed to lock your your device if you want to use their service. That said, since u paid full retail, they are REQUIRED to UNLOCK the device at your request since you are not under contract.
However, the stipulation to unlock is usually that you are leaving the Carrier. So essentially: being unlocked and working on CDMA and GSM is really only advantageous for getting more money for sale or trade or if you actually plan on leaving your carrier.
It's all pretty ridiculous. But I can assure you that US carriers lock all devices as soon as a SIM is in and the device is turned on.