locked verizon iphone 4s 6.1.3 - 7.1.1 and other noob questions

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hi apple noob here. i got this locked verizon iphone 4s on ios 6.1.3 and im able to use my straight talk at&t using gpp sim. im about to give it to a friend in dubai (etisalat carrier) and was thinking of upgrading it to 7.1.1 and getting a new gpp sim from ebay to make it work. i have some...

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Courtesy of WestNet Wireless
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