iPhone 15 Pro Max cellular service issues

I have an iPhone 14 Plus with Verizon and ESim only. Yesterday I had T-Mobile put a second eSIM in with a month of prepaid.

calling my usual phone #, at first I thought it worked, but then one call failed at the end of the day (failed for me means the call goes straight to VM and doesn’t show in missed calls). I’ll try again today.

I’ve posted another irritation regarding iPhone text messages now being very difficult to correct before sending - I’m assuming it’s to do with iOS 17.1.1 op system - but if anyone thinks it’s actually to do with iPhone 25 pro please let me know.

Thank you.

I’ve got a brand new iPhone 15 .. it’s been hovering between 1-2 bars of signal whereas my old iphone 7 (don’t judge) routinely would show a full 4 in the same rooms of my house & with the same new SIM.

I’ve just tried the eSIM hack & happy to report the new phone is immediately up to a full 4 bar! Thanks for the tips.

magnum09, opolopo posted a few days ago that signal can be better if you use an eSIM rather than a physical SIM card. I just installed one from my phone company’s website & it’s fixed the problem. They say to remove the SIM card as it’s not needed ..

haven’t done that yet.

Hello all, as ist looks this problem occurs when you ever inserted an 2nd SIM-Card (or e-SIM) in one of your previous phones. It seems that the iPhone remembers that somewhere in the backups and it looks that this problem is typical for the iphone15 pro /Max. It does not occur when you set up your iPhone without an backup of your previous phone. As soon as i inserted a second mobile e-SIM by converting a simple pre-paid physical card into an e-sim (this process is supported by the iPhone itself) and additionally inserted my original card the problem disappeared. It would be interesting to know if that little trick fixes the problem in general.

After you have installed the eSIM and reinstalled your original SIM card don’t forget to check if “Allow Mobile Data Switching” is turned on. I think the iPhone turns it on by default but check anyway. It’s this switch that fixes the poor signal, it allows data to be used from both SIM cards. Thus each SIM card supports the other.

I recently upgraded to an iPhone 15 Pro from an iPhone 11. My partner has an SE, and we are both on Verizon. Often when we take the subway, he will have several bars within a station, and I will have just "SOS". This is quite frustrating, as with my 11 I used to be able to refresh content on my phone between stations, and now I rarely can.

Am on a physical SIM and am facing the same issue. A weak signal is the form, and reboots are sometimes needed to restore a connection that has completely flatlined. Incredulous that we have to find workarounds for such a fundamental problem.

The bars aren’t the issue. It depends on the specific tower site. If it has the proper fiber, backhaul and density needed the tower site will perform properly on either 4G LTE or 5G. It really depends which 5G icon you see. If it’s just “5G” as an icon you see on any of the three Verizon, T-Mobile, and AT&T that’s their low band 5G which is barely a little faster than 4G LTE. If you see 5G UW (Verizon), 5G UC (T-Mobile), or 5G + (AT&T) then you’re most likely on their mid band 5G network the has more capacity for useable speed and data. Or you might tap into their millimeter wave spectrum which can give you gigabit speeds and a lot of much needed capacity that doesn’t lag. Also keep up to date on software updates. There’s always network updates to the phones cellular modem

One thing that helped me on iPhone 15 Pro was to switch the data mode to “Standard” (it was set to “Allow More Data on 5G” originally).

I don’t know how is this related, but the connectivity became better.

Settings > Mobile Service > the SIM card > Data Mode

I’m literally almost in tears bc this has wasted me days this week spending hours to connect to Verizon?? Then it’s back to this bs with the two cellular lines both not working.. i needed a working phone stat and have some really serious health issues going on. My Verizon agent who was very kind said he had the SAME ISSUE. I spent another 3 hours yesterday with no phone so only able to chat and it is already SOS no service… this really is unacceptable. I have no idea what this new phone even does because the whole time I’ve had it I’ve been trying to connect it racing trying to re-sign into everything.

Same issue- I kept getting weak 4G/5G signal on my iphone 15 pro max. Or sometimes when i have full bars with 5G but somehow the page/video/game isnt loading. Anyone facing same issue? I did a restart/network reset/factory reset but no use

whats the solution?

Apologies I totally forgot to provide an update.

Yes: having two active eSIMs appeared to resolve the issue. One was my original SIM and the other a new Pay as You go from the same provider (Giffgaff).

I have since swapped my original SIM back to a physical one, as per the original workaround.

Thanks for the confirmation. If you the two eSIMs were working, why did you swap back to the physical one?

I'm only asking as the eSIM i've got is from another provider, not GiffGaff, and i'm not entirely sure if it's going to work.

My phone was a 13 and now a 14 Plus and I am having the same (or a similar) issue. Calls intermittently go straight to voice mail (and don’t show up in missed calls).

The 2 eSIMs didn’t work for me (and the 14 doesn’t have a slot for a physical). I added a month of T-Mobile and still had the problem. I also tried switching to eSIM (on my 13), restarting from new, and later upgrading to a 14 Plus.

The only thing that’s working for me to be able to receive calls is a Verizon network extender. It gives me 4 bars of cellular service instead of 2 bars, and then all calls go through. However, if I turn the extender off, the problem still exists.

And my husband has an Android and he receives all calls, even before the network extender.