I agree that iPhone 4 is not eligible for an upgrade to iOS 8. So better to make contact with a local expert. I also use an iPhone which model is 5s was ordered from "Mobansp" online store. For me, it's working fine and I don't think it will be a good idea to change its OS.
IPhone 4 is not eligible for an upgrade to iOS 8 due to Apple's restrictions. Only the 4S and up are eligible.
SOURCE: I installed the last update of Itunes iOS 4.0 and
You mean the iPhone does not recognize the SIM, is it?
That's your iPhone must have been previously jailbroken and unlock. And you accidentally remove it by updating.
Don't worry, I will guide you on how to jailbreak and unlock your iPhone. Read my tips on the links below:
JAILBREAK
http://www.fixya.com/support/r5452955-jailbreak_all_idevices_iphone_4_3gs
UNLOCK
http://www.fixya.com/support/r5537989-unlock_iphone_4_3gs_3g_or_older_ios
For more iPhone / iPod touch tips, click here.
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SOURCE: update ios 5.1 with jailbroken iphone 4s
Not possible on 5.1 for 4s apple stopped writing the code for 5.0.1 already so a downgrade ain't happening bright side though any day now according to Twitter
SOURCE: Unlocking of iphone with some problems
Hi, Nothing to worry. You can know the network of your iPhone 4 by getting the Apple network an lock info service from http://www.simpleunlocking.com/apple-network-lock-info-service/rs16wp10/ Then you can unlock your iPhone 4 safer and easier through remote unlocking service. You can get the remote unlocking service for an iPhone 4 from http://www.simpleunlocking.com/apple-iphone-4/rs16wp9/ You can also visit http://www.mobileunlockguide.com/apple-iphone-4 This site provides free unlocking instructions. This could help you understand unlocking process better.
SOURCE: Can't connect my Motorola H500 Bluetooth now that I updated my IPhone 4S to IO 6
Check is motorola has released a firmware update on your headset
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