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3G on iPhone 12

I have just bought the iPhone 12 in the UK and and am very annoyed that there seems no way to switch the phone to use 3G data networks. 5g is limited here, 4g is very unreliable and when supposedly connected to 4g i often don’t get a data connection. I would like the option to use 3g if I want as otherwise my very expensive new phone is completely useless..! We have vast parts of the country where only 3G is available and the phone won’t contact to the network. How have apple completely overlooked this issue? Can Apple please fix this in the next software update? I can’t be the only person with this issue - I make me want to revert to my iPhone X...!!


iPhone 12, iOS 14

Posted on Nov 1, 2020 1:07 AM

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Posted on Nov 1, 2020 1:00 AM

That is a useless and unhelpful answer. I have a 3G/4g/5g SIM. It is exactly the same SIM I had before I bought the iPhone 12 and it worked on 3g just fine. This is a software issue, not a SIM of hardware issue. There isn’t an option to use 3g at all in iOS 14.1 on iPhone 12. That is the issue. There are a number of similar threads on other forums. https://forums.macrumors.com/threads/iphone-12-pro-and-3g.2262908/

322 replies

Nov 13, 2020 10:06 AM in response to tridebri

Please can you point out where I am being judgemental?


I have added all the screen shots for you. I have also added the spec of both models for you to look at at and they both have the same connectivity spec.

this means that they both can.


could your phone not be in range for 3G?


I have no idea what an AASP is but good if you have one but could you remove your sarcasm from the conversation that would be great.


I am just trying to help you

May 4, 2021 12:07 PM in response to techguy171

The only option to have options is to never upgrade your software and firmware that way in the future you wont have that much restrictions if i have not been upgraded my ios from ios 14.2. now i will be happy customer not frustrated today my phone battery last very little and i am really dissapointed i need either to buy iphone 12 pro max which is huge or to wait for firmware fix which can happen never... ot to switch to something else..

Same phone iphone 12 mini

ios 14..2 - There is a 3g option , same phone iphone 12 mini ios 14.5.1 3g option removed same carrier so its not carrier fault simply apple provided big restriction in order to sale more batteries and more phones... Marketing..



here i am showing 2 pictures

SAME sim card

2 different firmwares 2 iphones...

one of them have 3g/4g other one have only 4g lte /5g... after the upgrade different models of iphones .

IF I upgrade phone who still have 3g to the latest firmware it will loose that option as well.. apple rulez.






May 4, 2021 12:56 PM in response to techguy171

Please open your eyes people you lost Control over your phones, its not carrier related its not sim related its bot plan related, same sim card i put on my older iphone with older firmware and i can choose to use 3g or 4g... my findings are in order no to use 4g/5g you would need either older firmware or wait for upgrade to fix the issue or find old sim card before 5g/4g i have such old sim from different carrier when i put it inside my iphone even if the phone wants 4g 5g sim is only 3g unfortunately these sim cards are very hard to find and no longer for sale. Other solution will be to use other device or older firmware. I hope someone will find better fix right now i cant use my Very expensive phone its like paper i even post a picture right now Phone cellular internet is extremely slow i have option to use it as wifi device only i also tried restore and network reset here is a pictureeven app shows i got Slow internet if i had 3g option it will be fine but since apple removed i am ending with my iphone paper, my battery draining ratio is 10 min on 4g LTE and 10% gone if the battery and i dont download blu ray movies or play games and i also use low power mode for more battery... untill issue is resolved i must walk with my cable and charge my phone several times per day...

Nov 5, 2020 2:51 PM in response to TomLondon74

TomLondon74 wrote:

That is a useless and unhelpful answer. I have a 3G/4g/5g SIM. It is exactly the same SIM I had before I bought the iPhone 12 and it worked on 3g just fine. This is a software issue, not a SIM of hardware issue. There isn’t an option to use 3g at all in iOS 14.1 on iPhone 12. That is the issue. There are a number of similar threads on other forums. https://forums.macrumors.com/threads/iphone-12-pro-and-3g.2262908/

Your carrier provides the carrier settings in the phone. Apple has nothing to do with them. If your carrier choses not to let the iPhone use 3G, there's nothing Apple can do.


Talk to your carrier.

Nov 5, 2020 4:34 PM in response to filippo1992

filippo1992 wrote:

No, same SIM, same carrier, same plan. iPhone 11 had 2 mobile data options: 3G or 4G; iPhone 12 pro has: 5G, 5G auto and 4G. the 3g only option isn't available.

It has nothing to do with the SIM. It has to do with the carrier settings in the phone. Those settings are pushed to the phone by the carrier. The carrier determines what you'll be able to do. For example, my carrier doesn't allow me to turn on or off caller ID from the phone.

Nov 13, 2020 3:58 AM in response to TomLondon74

Hi I had this worry to but I got the 12 pro max today and I live in a poor signal area so I thought I would see what the signal was like. Turned off WiFi and for the first time in a long time I had 3G signal in my house which never happens.


I think the worry over the 5G and 4G options is unnecessary as it will automatically go to what signal is available. I think the options are just there to help with battery life.


but everyone needs to remember 2G it always runs in the background and your phone will use it when 3G isn’t available too

Nov 13, 2020 9:31 AM in response to tridebri

Could you please remove the judgment from the conversation? I actually own an AASP and do know what I’m talking about… iPhone does not connect to 3G. It is an iPhone 12 pro not a max so maybe there is a difference between the two.


There are many of us who have ordered and are trying to use the iPhone 12 Pro but find that it does not work in the rural areas where we live or work. A screenshot of that same screen would be very helpful.

3G on iPhone 12

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