Currently Being ModeratedMar 4, 2012 8:35 AM (in response to nickstock)
you need to turn off the phone, then connect it while holding the home button until the graphic that says connect to itunes appears... then restore.
(once again, no matter what service provider you have!)
Currently Being ModeratedMar 4, 2012 8:39 AM (in response to aaron1266)
That will restore the phone, but it probably won't get the phone activated. From what he said, I don't think the phone was ever successfully activate. We need zozzahh to clarify.
Currently Being ModeratedMar 5, 2012 11:17 AM (in response to nickstock)
I'm really tired of this problem, and what most bothers me is that Apple take so long to fix it. If this week does not go the upgrade of IOS, I sell my iPhone, iPad, MacBook. I got tired of this **** does not work, as you may not run a sim on a cell phone and that take more than 2 months to fix it? And I do not answer saying that the solution is to restore it because I did it 100 000 times!
Currently Being ModeratedMar 5, 2012 4:52 PM (in response to ptnik)
I'm so tired of this problem.
I used restore. I changed sim cards. Nothing helps.I found thread, there are images of different types sim cards. I though I need old type sim card. So I found my old sim card and activated with my carrier. Nothing helps.
I figured out that ios makes something like image of sim card and works with it. Because if I see Invalid sim and try to eject sim card the phone still shows me carrier title and still trying to find network. But there is no sim card in the phone! iPhone do not understand it... Or maybe modem hangs up.
I do not know what to do...
I started to experience problems after update to iOS 5.0.1 (9A405). Then I updated to 9A406. Then I restored settings several times. And so on...
These are several types of sim cards.
iPhone 4s 16Gb Black
iOS 5.0.1 (9A406)
Modem FW 1.0.14
Currently Being ModeratedMar 5, 2012 5:45 PM (in response to ptnik)
And this is the last report from iOS:
reason: "modem reset: Call state out of sync"
How do you like this string
reason: "modem reset: Call state out of sync"
Currently Being ModeratedMar 6, 2012 2:40 AM (in response to ptnik)
Some more info that might help explain the dropout issues:
"The issues appear to be due to the iPhone 4S only supporting the GSM P band (885 - 915 MHz) and not the E band (880 - 890 MHz), both of which are in use by China Mobile. The P band is primarily used for outdoor use, while E is designed for indoor areas -- train stations, conventions centers, and the like. When China Mobile users move into an area without P coverage, they still see full signal strength, but the connection is dropped"
Currently Being ModeratedMar 7, 2012 4:16 AM (in response to ptnik)
Makes sense...but still does not explain on why the issue occurs with certain iphone4S pieces and not with the others that are carrying the same baseband. If the problem is software based then it should be across all iphone4S that are there in use.
My problem has become much better as I use the phone more regularly now. 1 reboot required during the day other than the early morning reboot that I have now started accepting as a routine habit like brushing my teeth in the morning :-). One interesting observation today morning was that I did not get the invalid sim status as I had slept off with the earphones plugged in. I know the earphones act like an antennae for mobile radios so could be the earphone helped in maintaining signal through the night.
Awaiting ios5.1 with bated breath!!!
Currently Being ModeratedMar 7, 2012 6:59 PM (in response to ankz74)
good news for my iphone that this morning i woke up and don't see the "invalid sim" anymore. I don't think it's because i plugged the earphones over the night (because the day before yesterday I also plugged earphone but still i see the invalid sim), but I notice that after i installed an app named "planner and lite: appointments, tasks, note and reminders", my iphone started having invalid sim. i after changed new sim, restore iphone in different ways (upgrade to 406) I couldn't fix the problem but my iphone start having another problem of loosing signal always and I couldn't send txt or call right away. Always it was searching first. So i removed that app, and my ip has no problem of lossing signal, and after two days i.e. today, my ip does not encounter "invalid sim". I will see if tommorrow I will have invalid sim again or not, hope not.
Currently Being ModeratedMar 8, 2012 2:38 AM (in response to ptnik)
Lets us know how your experience with iOS 5.1 goes, and if it fixed your issues.
Update process (over the air) worked smoothly.
First report... network connection seems more stable, but it didn't fix my other issue of some messages/caller ids showing up as "numbers" instead of the contact name - unbelievable Apple didn't get this fixed yet!