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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Important Carrier Message "Unlock iPhone to view message"

Yesterday I made an update to the latest iOS version. Now I have to unlock the phone to enter the passcode for Mobile ID (2FA authentication). Before the update, I could enter the Mobile ID passcode ...
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Call Forwarding with non-call-enabled sim

I have dual sims: one is a data only plan (i.e. it cannot receive calls, it is not connected to the phone network) and the other can receive calls. I used the data only sim for all my contacts for ...
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Every 2 mins I get a notification says my number "will continue to be registered for iMessage and FaceTime. You can change this in Message Settings"

It says the following when I open the notificiation. This number is registered to your Apple ID, but is not associated with this phone. You can keep using the number for iMessage and FaceTime until ...
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How to turn off incoming phone calls for a specific SIM card / phone number?

I moved countries and I'm keeping my old phone number just to accept texts from old contacts. This is on a secondary SIM card. However, I have very high roaming fees and occasionally I'll answer a ...
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Can I test a replacement iPhone I bought at auction for carrier compatibility by inserting the SIM without screwing up my existing account?

I bought a replacement iPhone SE (older model) because battery on my old one was waning. I need to test it before return window expires to make sure it is compatible with my carrier (Verizon) but I ...
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Iphone SE 2 : Dual SIM - Calling back from Secondary SIM (Incoming call received in Primary SIM)

Dual sim iphone calling primary call from secondary SIM I have a Iphone SE 2 with (Primary - Physical SIM and Secondary - eSIM). When I try calling back the Missed calls/Incoming calls, I'm able to ...
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How do the iPhone unlock chips work?

It seems like there's no questions about unlocking iPhones here so forgive me if this is counted as off-topic. I recently received an iPhone 7 from a friend that is locked to Sprint's network through ...
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Recover contacts with old country code, new iPhone in a new country

I just bought a new iPhone, with iOS 15 after moving to another country. But after getting a new SIM and transferring all the data, the countries area codes got messed up. I have the old contacts in ...
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-2 votes
1 answer
416 views

What's the difference between an "eSIM" and a "Digital SIM"?

I thought that ESIM and Digital SIM were the same thing, to be distinguished from a physical SIM. However, my iPhone SE shows that I have an ESIM and a Digital SIM, and they have different IMEI ...
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2k views

Change preferred line for multiple (all) contacts

When using a dual sim the Iphone has a system where it automatically overwrites the default sim card to be used for calls and messages. Instead it uses a setting saved per contact that it will choose ...
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iPhone xs Max eSim using mobile data

I am using iPhone xs max, i use for call, for mobile data, massage on primary sim and secondary only for for backup mean i can only use for selective call number but i am facing a problem when my ...
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Syncing calls and text from an old phone device to iphone live

Syncing calls and text from an old phone device to iPhone live Context: So I've got two sims: one which has a good data plan, and one which has a good texts/calls plan (i.e. on the first sim, I can'...
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  • 161
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If I switch a SIM card from an iPhone to an Android, then back to the same iPhone, will data be lost?

I want to take a SIM card out of an iPhone 7, stick it into a Samsung Galaxy A30 for a day in order to make calls from that A30, then switch the SIM card back to the iPhone. Do I need to back up the ...
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2 votes
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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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2 votes
1 answer
49 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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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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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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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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2 votes
1 answer
7k 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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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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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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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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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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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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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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1 vote
0 answers
70 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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1 answer
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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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153 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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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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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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3 votes
1 answer
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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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2 votes
0 answers
142 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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1 answer
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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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-2 votes
1 answer
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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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482 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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2 votes
0 answers
68 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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1 vote
0 answers
34 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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0 votes
1 answer
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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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0 votes
1 answer
193 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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2 votes
2 answers
62k 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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1 answer
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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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2 votes
1 answer
154 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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5 votes
2 answers
34k views

How to disable the physical sim and only use the eSIM on dual sim iPhones?

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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1 answer
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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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-1 votes
1 answer
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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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1 vote
1 answer
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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1 vote
0 answers
30 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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0 votes
0 answers
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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  • 3,355
1 vote
1 answer
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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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1 vote
1 answer
378 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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