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I want to download iPhone firmware, but I don't know my iPhone is Global or GSM so…
What is difference between 'iPhone 5 (Global)' and 'iPhone 5 (GSM)'?
How can I recognize if my iPhone is Global or GSM?
grg♦The CDMA model presumably has compatibility in more markets than the standard GSM model. According tot he list below, unless you ordered your phone from a Chinese firm, if you have a CDMA model it also supports GSM.
GSM is a European standard and supports the EDGE network. CDMA supports some networks branded as '3G', but YMMV. Both are getting a bit long in the tooth as far as cutting-edge goes (IMO).
You can use this list to help identify if your model includes CDMA (Global) or GSM:http://support.apple.com/kb/ht3939
Check the 'Model' at the bottom on the back of the phone and cross-reference it with the model number on that list. Here are the relevant iPhone 5 data:
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