How can I get my iPhone 3GS to recognize my AT&T SIM card after upgrade
to iOS 5.1?
i upgraded previously-unlocked iphone 3gs ios 5.1 today, ios 4. hadn't upgraded os in awhile (since phone unlocked before trip overseas).
itunes says: "there no sim card installed in iphone attempting activate. please disconnect , insert sim card in iphone." tried taking out , reinserting sim card, didn't help. seems cannot restore factory settings now, since itunes doesn't think phone has sim card , won't connect phone @ all.
realize should have restored factory settings before upgrading, given did not, how can fix retroactively?
help?!
thanks!
put it in dfu(device firmware update) mode here how: 1)turn phone off 2)press , hold home/wake , sleep/power on button 10 seconds 3)after ten seconds let go of power button , continue holding home button further 10 seconds. itunes inform has discovered iphone in recovery mode,go iphone tab , should give option restore iphone press that,after let thing if require additional assistance dfu mode go link: http://limitededitioniphone.com/how-to-put-the-iphone-into-dfu-mode/#comments
Forums iPhone, iPad, and iPod Touch iOS Older iOS Versions iOS 5 and earlier
if require additional assistance dfu mode go link: http://limitededitioniphone.com/how-to-put-the-iphone-into-dfu-mode/#comments
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