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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > iPhone ,iPod & iPad (Apple Inc. Products) > iPhone 2 / iPhone 3G / iPhone 3GS

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Old 01-05-2009, 00:44   #1 (permalink)
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How can I solve Invalid sim problem?

i have problem How can I solve Invalid sim iphone 3g
i done unlock with yellowsn0w and 02 sim card working fine but when i put another sim card comes with no signal after airplane mode on and off comes with invalid sim

please any solution to get remove invalid sim problem

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Old 01-05-2009, 01:52   #2 (permalink)
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juste restore agane thx and tested
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Old 01-05-2009, 02:39   #3 (permalink)
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what restore? you mean reinstall yellowsn0w or restore iphone with 2.2 ? what you wanna say or restore network?
tomeny thing to restore.
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Old 01-05-2009, 04:16   #4 (permalink)
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use itunes to restore phone's firmware
and use ziphone to activate, jailbrake, and unlock..
thats all works perfect......

need assistance?
ym... [email protected]
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Old 01-05-2009, 07:25   #5 (permalink)
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no need to restore

try this

-remove sim

-uninstall/remove yellowsnow(not reinstall)

-insert sim

-intsall yellowsnow

after installation of yellowsnow sometimes signal appears.. but if it's not try this

-turn off iphone (w/o tapping on return to cydia after installation)

-count 3 - 5 seconds before turning it on

-when it turned on go to>settings

-turn airplane mode ON

-wait 5 - 10 seconds then turn it off

now your phone must have a signal..

it works for me 100%

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