iPhone network & strength constantly changing

[waaaffles]

Hello,

My phone seems to be constantly changing the number of 'bars' and network it is using.

I took a two minute video after powering up:

In the two minutes, the number of bars on the LTE network jumps between 1 and 2, then 'LTE' even blinks a few times, then it switches to 3G, back to LTE, then 3G again. Sometimes it changes to 'No Service'.

I have tried multiple SIM cards and the issue follows the phone. I have also tested from multiple physical locations. Using another phone in the same location has no issues, even with the same SIM.

Telus says it is a phone issue.

Anyone have any idea of what the issue could be?

iPhone 6s, iOS 10.3.3

 

[Audit13]

My 8 month old 6s does the same thing.

I hold my 6s next to a 6s Plus. Both are running the same firmware, same carrier. The Plus will get 5 dots, mine will get 2. I make a call, the 6s goes to 5 dots and back to 2 or 3 dots when I hang up.

I had it changed at the Apple store for a replacement and the replacement does the same thing. Doesn't matter whether I don't use a case and how I hold.

You can test your signal strength too by dialling *3001#12345#8, press call button, and read the signal strength. It can vary from -40 to -130. -40 is the strongest. At -130, you basically have no service.

 

[waaaffles]

Hi. Thanks for your post.

I may have fixed the issue by resetting network settings. Maybe you can try it too.

See this link: https://support.apple.com/en-us/HT201415

 

[Audit13]

I did the network reset but it didn't help so I had the apple store change my phone but still no improvement.

 

[off_piste]

I've been noticing my 6s plus gives a no service message more frequently now. I just had it replaced under AppleCare+ and I don't remember my old phone having this issue. I did just download the latest iOS though.

 

[Audit13]

My 6s behaved the same way under 10.3.3 as well, even after changing the phone.

I'll have to be patient and wait until the next iOS release for a possible improvement.