Questions tagged [sim]

Subscriber Identity Module: a chip card or electronic analog that maps a cellular service account to a specific hardware device.

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16 views

What happens to the mobile number used by FaceTime/iMessage on an iPhone when swapping the SIM containing a different phone number?

Assume the following: FaceTime/iMessage are activated on an iPhone - using both the phone number associated with the SIM card that's currently inserted in the phone, as well as the email address of ...
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1answer
36 views

Which phone number is shared by Apple Pay in a dual SIM iPhone?

When adding a card to Apple Pay, it says that your phone number may be shared with the bank who emitted your card. But in the case of a dual SIM phone which number is shared? If you have a personal ...
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1answer
34 views

Do iPhones sold in the US support dual physical SIMs?

I saw this picture on Using Dual SIM with two nano-SIM cards, which suggests recent iPhone models may support two physical SIMs: A friend allowed me to play with his new iPhone 12 (bought in the US), ...
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319 views

Dual SIM: How to choose phone number when replying to SMS message in Messages

I have an iPhone with an eSim and physical SIM and therefore 2 different phone numbers. There is a message thread in Messages that contains messages sent to both of these numbers. I want to know, when ...
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1answer
19 views

What happens if your iPhone becomes damaged while preparing for AppleCare+ Repair?

I recently cracked my iPhone XS's back camera. Since it is under AppleCare+ until early October, I paid $99 for an Express Replacement which requires that I mail the broken phone to them. ...
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185 views

Previously unlocked iPhone locked its SIM after Erase

My iPhone 7 was unlocked, I had it for over two years now, used with a UK SIM mainly but I also used it with foreign SIMs when traveling, so I know it wasn't locked to just one operator. But I ...
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35 views

Using my iPhone, as a Wifi iPhone without a SIM card

I have recently given up my network phone service (removed my SIM card) and adopted a wifi based app that allows me to pay for my minutes as I go. Has anyone started this path to converting your ...
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1answer
3k views

Shortcut to switch off and on individual cellular network

iPhone iOS13 w/ dual SIMS: T-Mobile (EU) & AT&T (US). I need help shortcut script: IF I arrive home THEN turn on airplane mode and WIFI GO To Settings -- Cellular (Cellular Plans) 1 ...
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1answer
94 views

iPhone Activation with NO SERVICE problem

My iPhone7 started with "NO SERVICE" problem, I fix it by restore system but a week later the problems appears again. Then I do a fabric reset but now I can't activate my Iphone because it can't read ...
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0answers
13 views

Place call from iPhone 5 using SIM in iPhone 8

I'm apparently offered in iOS 13 on my iPhone 8, under "Calls on Other Devices", to make and receive calls on other devices. My iPhone 5 is listed and enabled as one of those devices. In iOS 10 on ...
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2answers
2k views

How to avoid iMessages services carrier charges after every restart?

Everytime I restart my iPhone, I have to verify/activate my iMessage services(both FaceTime and iMessages) I have to pay carrier charges. I selected the option to use Apple ID to send and receive ...
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1answer
42 views

trying to unlock iPhone 5c

I'm trying to unlock an old iPhone 5c to access some pictures I have on there. Every time I try to unlock it, it takes me to the white screen with the "Hello" message, and then it tries to connect to ...
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1answer
29 views

Will a deactivated SIM card continue to improve location accuracy?

I'm wondering if a prepaid SIM card that ran out of funds still in my iPad will continue to improve the devices location accuracy (by scanning nearby cell towers and apply triangulation)?
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1answer
141 views

Disadvantages of using sim card from old iPhone?

I upgraded from an iPhone 5 to XS. the 5 had a mobile-carrier company sim card (non-apple). To save phonecalls, I just plugged in the old sim card into new phone and it worked. I think the new phone ...
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0answers
66 views

Why does my phone get stuck “Searching…” and requires a DFU reset?

I have an Iphone 8 plus, very well looked after, and about 3 months ago i changed my carrier. Two weeks ago, my phone "failed to activate mobile network" a few times, and i restarted it, which put it ...
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1answer
25 views

iPhone connectivity issues abroad

I have a fully functional iPhone X which works as expected in Sweden. However, when traveling to some countries I experience connectivity issues. Eg. in the US I get no reception at all, whereas in ...
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22 views

How to get carrier signal after returning from international travel

So I’m sitting here connected to WiFi in the Houston airport on a long layover, returning from my trip to Mexico. The top left of my phone says “No Service”. I’ve chatted with my Carrier (Sprint) ...
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1answer
62 views

Using an expired SIM card in Airplane Mode

I have iPhone 6S. My mobile phone and data plans are with Ting, a US-based mobile virtual network operator that uses the framework of the US-based Sprint Corporation telecommunications company. I'm ...
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1answer
73 views

New SIM card does not support data traffic in old iPhone

I have just received a new SIM card I want to use in an iPhone 4S. The phone reports decent 3G connectivity and can make phone calls, but it does not connect to data services. Data services work when ...
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1answer
2k views

To understand working of Cellular iPad+iPhone and number of sim cards required

I am totally confused by iPad Cellular calling features. If I put a sim card in iPad cellular, how do I make or receive calls in iPad since, there is no default dial app in iPad. Case 1: 1 sim card: ...
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0answers
125 views

iPhone 7 won't activate and can't access Apple Support or iTunes

My new iPhone 7 recently had an error that said it lost cellular connectivity and required an update. I'm traveling and don't have access to iTunes (on work computer and I cannot install software). I ...
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1answer
40 views

SIM unlocked Apple Watch gift

If I am to purchase an Apple Watch in NYC to be used by a relative in Amsterdam, can I purchase a SIM unlocked watch and expect it to work with any of the carriers? If not, which carriers will support ...
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1answer
67 views

StraightTalk Wifi Calling with ATT iPhone 6

If you have experience with using an ATT iPhone on the StraightTalk, please state which iPhone + IOS version you have tested with StraightTalk. If there were any changes required to the ATT iPhone ...
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353 views

Iphone 4 stuck when trying to unlock with SIM PIN code

The phone works normally except for the SIM. I can unlock it, then open apps, preferences etc. I've made a backup in iTunes, then reset the phone to factory settings, then restored the backup. This ...
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0answers
58 views

iPhone: Scan Cellular Network

When I scan for Cellular Network on my iPhone (Settings app → General → Cellular → Network Selection → Manual), the only networks that I get is from my ISP, the company that I bough my SIM card from. ...
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28 views

Wi-Fi Calling: Straight talk iPhone 6s with T-Mobile SIM

Wi-Fi calling requires an iPhone 5c or newer. I would like to migrate from ST to TMO with a 6s. As I understand it both carriers support Wi-Fi calling. Assuming that the 6s is SIM unlocked, what ...
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1answer
41 views

SIM card transferrable between iPhone models?

My iPhone SE is not working anymore and someone has offered me an older (2015 - she doesn't know the model) iPhone that her husband bought shortly before his death. Can I transfer my SIM card (...
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1answer
183 views

Changing sim cards on iPhone 5s

I have changed my network provider and inserted their sim into my iPhone 5s. The phone is unlocked, all my contacts were saved... but the sim card has the default code 0000, and I want to change that ...
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3answers
39k views

Does WhatsApp work without a SIM card?

In my Moto G5, I can still use WhatsApp after removing the SIM card, after I successfully validated my phone number. Would this method work in an iPhone?
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1answer
655 views

Using iPhone SIM in an iPad?

Background - earlier this year, Verizon ran a BOGO sale where I was able to get an iPhone 8 for 'free', the catch being, I needed to add a new line of service. Given the bump from 3 lines to 4 was ...
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1answer
121 views

Use SIM card on international roaming only for voice calls (sans mobile data)

I would like to know whether I can use my iPhone 6 with Pakistani SIM card to make and receive phone calls while roaming in UK. I would not like to consume any mobile data (for Internet/background ...
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2answers
18k views

How to disable the physical sim and only use the eSIM on iPhone XS/iPhone XS Max?

I'm wondering if there is a way to turn off the Physical sim and use only the eSim on my iPhone XS Max. I travel a lot and I'm loving the use of eSIM. I understand that I can turn off the eSIM if ...
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1answer
48 views

Unfamiliar prompt when inserting new prepaid SIM card into iPhone in China

While visiting Shenzhen, China yesterday as a tourist I acquired a prepaid +86 SIM card from China Unicom. Everything seemed to work out fine, but I am wondering about one observation: When the sales ...
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1answer
44 views

Moving Sim card to another phone

I bought a new iPhone. I want to put my wife's sim card into my old phone. Her iphone is an iPhone 6+. The iPhone I want to put it into is an Iphone 7+. I tried it and it doesn't work.
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1answer
6k views

Does iPhone Xs Max have a SIM card slot?

I’m confused by the store listing and want to make sure I’m not tricked into buying an eSIM only iPhone.
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0answers
29 views

iPhone not connecting to cellular service

For about two weeks now the service bar on my iPhone 7 Plus only says searching. I contacted my service provider and they said it was the SIM card but I switched my SIM card with another iPhone user ...
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0answers
22 views

Puzzled about (lack of?) Apple SIM

Apple's store web pages began saying some time ago that cell-enabled iPads include an Apple SIM. I have a barely working iPad that I had a data plan on in Korea in February. But because it is broken,...
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1answer
1k views

iPhone in Lost Mode Can I use same apple id on new phone

My iPhone was recently lost, I put it in lost mode via icloud and I know it was found by someone because I got the email from icloud saying it's been found as well as a last known location...but it ...
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1answer
249 views

iPhone 7 Sim Switching, Account Switching or just Normal Domain Traffic?

I think there is some funny business going on with one of the devices in my house. I'm not sure if the person is changing into between iCloud Accounts on the same device, or switching Sims or using ...
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1answer
28 views

Wi-fi doesn't work on my iPhone 4

If I do not have a SIM Card installed in my iPhone 4, will it still connect to the internet? I have tried to connect via WiFi, it says that it is loading, yet doesn't connect. I don't know if it has ...
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1answer
204 views

Possible to transfer an active, Verizon sim card to an unlocked iPhone 8 purchased from the Apple store?

I would like to purchase an iPhone 8 as a gift for a current Verizon customer who is still using an old iPhone 5c. I plan to purchase the phone outright and since the cost at the Verizon store is the ...
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2answers
3k views

Does Apple Watch Cellular clone the SIM card?

I have read, that Apple Watch will have the same phone number as iPhone and if iPhone is far away, it can connect to cellular network itself. Doesn't this mean that Apple Watch clones the SIM and how ...
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1answer
665 views

EE blocked my stolen phone's sim, will this prevent Lost mode from taking effect?

I had my iphone 6s plus stolen in a nightclub at the weekend, I activated lost mode straight away but the phone was offline. I then phoned EE to report the theft and they blocked the sim, but I've ...
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1answer
258 views

Can I buy an Apple SIM card if I’m not a resident of the country where it's sold?

Can Apple SIM cards be freely purchased, or are they tied to having an address in one of the thirteen countries where they are sold? I noticed an article on Mac Rumors that headlines “Truphone's Apple ...
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1answer
1k views

How do I fix “could not activate cellular data network” problem when returning to US after traveling and using a different SIM card?

After traveling overseas (Vietnam & Japan) and using a SIM card for each country, I restored my AT&T SIM card into my iPhone and got: I tried the suggestions in https://support.apple.com/en-...
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1answer
817 views

Carrier SIM card and unlocking issues…

I recently purchased a used iPhone 7 to upgrade from a 5s. The new iPhone was on AT&T and I use Verizon, so I knew it needed to be unlocked before I attempted to use my current SIM card in it. I ...
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1answer
504 views

Can I use any Sim to activate/set up iPhone 5s

I recently ordered a straight talk iPhone 5s from swappa. I plan to just use it as a wifi device but my question is, can I use any sim card for the initial set up or does it have to be specifically ...
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1answer
401 views

What is busy calls?

In phone settings on iOS I have a button called "SIM apps" when clicked it gives me a button to open an app called Busy Calls, the app starts with the screen on the left. If I click "Edit SMS ...
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0answers
135 views

Manage multiple SIM cards by connecting them to a device at home and using them remotely [closed]

I have 3 SIM cards and I don't want to have 3 phones to manage them. I just want to know if for example I can keep one of the cards in my phone and keep the two others in my house plugged in one ...
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2answers
438 views

How can I find my lost iPhone 7 Plus?

I lost my iPhone yesterday and I didn't turn on mobile data, so I couldn't use Find my iPhone to locate it. I have tried to call many times, but no one answers and the phone keeps ringing. That means ...