Subscriber Identity Module: the chip card enabling access of a mobile device to an operator network.

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8
votes
3answers
50k views

iPhone can send iMessages without a SIM card?

I gave my old iPhone 3GS (iOS 5.0) to a friend, and after removing the SIM card, we noticed a peculiar behavior. My friend is able to send texts via iMessage from the old phone number. Likewise, I can ...
1
vote
3answers
2k views

Getting an unlocked iPhone 4/4S to work on T-Mobile

There are several aspects I'm not clear on, and I'm wondering if what I want is even possible. 1) I want an unlocked (officially; no jail-breaking) iPhone 4/iPhone 4S. The iPhone 4 unlocked is ...
0
votes
1answer
218 views

Is the iPhone 4S hardware compatible worldwide with other SIM based networks?

I particularly want to know if iPhone 4S can work with other networks that use SIM cards when the device is authorized to be unlocked. With these conditions, can it take a SIM card when traveling?
1
vote
1answer
3k views

Does iPad 2 3G's GPS work without SIM card inserted?

I own an iPad 2 with 3G but I've not inserted SIM card and I'm not planning to unless it's really necessary to get GPS working. I was wondering if iPad 2 3G can navigate without SIM card (thru ...
0
votes
1answer
776 views

iPhone 4, only emergency calls

I bought new Neverlock (sim free) iPhone 4 with 4.3.5 firmware. Then I would like to return it to factory settings and click "Restore" in iTunes. But after restoring i received unlocking device with ...
1
vote
3answers
2k views

Is there any way to transfer data from old phone's sim card to iPhone 4?

I recently got the new iPhone 4 but it doesn't have my contacts and old text messages etc. I previously had the iPhone 3gs. When I upgraded my iphone 3gs to iphone 4 they gave me a new sim card but it ...
0
votes
0answers
427 views

Why does my iPhone 3GS drop service and delay receiving of data?

I have a 16 GB iPhone 3GS. The phone is dropping the network sporadically. I am in a metro area that should have full coverage. I know I should have service, because I can sit right next to someone ...
1
vote
2answers
1k views

iPhone 4 no longer detects SIM card, how can I fix it?

Since 3 months I do have an iPhone 4, 3 weeks ago i started to get no SIM card installed error increasingly more frequent. Right now the phone is unusable. I went to a sales office of my mobile ...
1
vote
2answers
895 views

Is Jailbreaking And Enabling Bluetooth File Transfer On iPhone 4 Financially Secure?

I want to use iPhone 4 for sensitive information. Will jailbreaking, downloading unofficial apps (not registered in Apple's App Store) and enabling Bluetooth file transfer cause a chance of sensitive ...
3
votes
2answers
853 views

Iphone 3G shows 'no service' eversince I came back from Malaysia

I'm using Iphone 3g for a year exactly and have no problems at all until recently I went to Malaysia. it says 'no service' where the carrier name supposed to be. so I assume its because since I'm out ...
2
votes
4answers
13k views

Moving Sim Card from One iPhone to Another

I am looking to buy an iPhone 4 from the secondary market. I currently have an iPhone 3GS. Can I just replace the sim on the new iphone with my current sim? Or is there something else that I need to ...
0
votes
1answer
474 views

From a jailbreaked iphone 3g 4.1 (foreign sim locked) to 4.2

A friend of mine bought an iphone 3g with a sim card in another country. Some months ago he gave me this iphone, but he forgot to give me the sim too, so I've jailbreaked it leaving the sim-lock, that ...
1
vote
3answers
8k views

No SIM Card installed error in iPhone 3g

My iPhone 3G is showing No SIM Card installed Insert a valid SIM With no PIN lock to activate iPhone It is in Emergency mode so please give me a solution if there is..? It happened when I am ...
1
vote
1answer
1k views

iphone jailbreak - its asking for active sim card

i'm in china and need to jailbreak/unlock my iphone to use it here with chinese sim card. I followed the instructions online about how to do this using a program called snowbreeze. It worked and i ...
19
votes
4answers
173k views

Is it possible to use an iPhone without a SIM card as an iPod touch?

Is it possible to use an iPhone without a SIM card as an iPod touch? I have an old iPhone 3G that no longer has a SIM card and I want to use it as an iPod touch. How can I achieve this?
1
vote
3answers
1k views

Does upgrading iOS change my IMEI?

Does upgrading iOS change my IMEI? I was told not by AT&T not to remove my SIM card or certain restrictions that they had placed on the iPhone, at my request, would be lifted. I want to know if ...
2
votes
1answer
582 views

Are iPhone sim cards locked specifically to the iPhone hardware?

I've got an iPhone 3GS, on the UK network of O2 Can I take that sim card out, and put it into another mobile device (not iPhone) ? I don't have a spare device to try this hence asking here More ...
4
votes
1answer
899 views

Is possible to use a Micro SIM in iPhone 3GS?

I want to use my old iPhone 3GS, but don't want to pay another plan for the occasional use.
7
votes
1answer
453 views

Using my current 3G Sim with the iPad

I'm thinking of buying an iPad at some point, the one with 3G. I also have a 3G dongle that I'm not really using at the moment and wish to use on the iPad. I understand that it's a MicroSim, and I ...
15
votes
1answer
49k views

How do I change the PIN on an iPhone?

A simple one, I guess: I recently bought a new (unlocked) iPhone, and at the same time changed my phone subscription to another operator. How can I set the PIN code on the new SIM card to something ...
11
votes
4answers
26k views

iPhone stuck at “No SIM card installed”

I "retired" my old iPhone 3GS when I got my shiny new iPhone 4 and I was happily using it as an iPod touch with camera and compass. However, I made the mistake of throwing away the SIM inside the ...
6
votes
3answers
1k views

Is it possible to activate an iPhone 4 without a SIM?

So we bought an iPhone 4 from the Apple store. But we didn't get a micro-SIM as there are no PAYG tariffs on micro-SIM available. Is there anyway to activate the device without getting hold of a SIM? ...