Other Iphone got warm and lost percentage after wifi service went out

[Brapinator]

I have wifi assist turned off. I had my phone on my nightstand and was half listening to a video on YouTube via the speakers while doing some paperwork. I started a new video, checked the battery level and checked the time and went back to work.

I kinda zoned out a few minutes later and realized I wasn't hearing anything. I looked over and saw a pop up that said my wifi connection had no internet and asked me if I wanted to temporarily switch to mobile data or keep trying wifi. I hit keep trying wifi and let it set for about a minute or so and it was showing the bufferinganimation. Nothing happened after that minute or so, so I turned my samsung tablets screen on and sure enough it had an exclamation point in the wifi icon, meaning that for sure my wifi was messed up. Happens every once and awhile, but this is the first its happened since I got my iPhone. I just recently started using iPhone about a month ago. So I pick up my iPhone to close YouTube and just wait for wifi to come back.

it hung up and was displaying that pop up I mentioned for about 2 minutes and when I clicked keep trying wifi I let it set there for about 2 minutes. So it was "hung up" for about 5 minutes. I noticed when I was gripping the phone, the back was warm. The phone was ice cold when I sat it down, and it was ice cold every time i picked it up to change videos,but it was warm now in the back. When I hit the home button to close YouTube, I noticed my battery was now 56 percent, and just 5 minutes before that it was 62 percent! I know when on YouTube I lose about 4 or 5 percent every 30 minutes, but here it dumped 6 percent in just 5 minutes and the back was warm. After I locked the phone and set it down, it went back to being ice cold and stayed that way over the course of the next 45 minutes until my wifi came back. The battery stayed on 56 percent too. When it came back, i started playing the video again, and I was back to using the usual 4 or 5 percent every 30 minutes and the phone stayed cool.

I can only put 2 and 2 together and say that it got warm and lost that amount of battery because the wifi went out, but what made it do it? Was it continously attempting to find the connection? I can assume that if I had wifi assist on, it would have just switched over to cellular data and kept going good. But what caused it to warm up and lose battery just sitting there buffering and the pop up asking me what I wanted to do?

 

[Brapinator]

Bump?

I'm glad to know that when I went back to the home screen and clicked the screen off that the phone calmed down and cooled back off and the battery drain stopped, and everything behaved over the period of 45 minutes that the wifi was out. Getting warm and dumping the battery while its out and the screen is on to see that is one thing, but I don't think I would appreciate it if it would have continued to do it while the screen was off. If the wifi would ever drop and the phone was off, it would drain the battery til dead, so I'm atleast grateful it all stopped when the screen was off.

 

[Frijid]

I've seen phones get warm in a poor cell service or no cell service area and the battery drain. Not sure if it was 6% in 5 minutes worth though.

If I recall, wifi assist isn't as aggressive as it used to be in handing off to cell data.

 

[Brapinator]

But what I don't get is, it never lost the connection with the wifi, just the service. It was still showing all full bars in the wifi symbol. So it had a connection, just no internet. Would that still cause it to warm up trying to find the internet?

 

[Brapinator]

Ok something is definitely up with it. At this usage of 12 hours of mostly standy with a couple text message and a phone call of about 1 minute I should see 96 or 97 percent. I'm at 91. Ive been home all day on a tablet and roku TV and the wifi is working perfectly. Battery health is still 100 percent and I checked the battery times. 0 minutes screen off time. Screen on time has been 8 minutes, with nothing showing background use. The phones never done this before, thats how I know what to expect with my usage and percentage. It has been 6 days since I've restarted the phone, so I'm gonna do it tonight and see what happens

 

[pbonitati]

I don't know your network setup, whether you have a modem\router combo supplied by ISP or you have those separated out with your own gear, but it appears to me that your ISP\Modem was having issues. By you hitting the keep try button definitely attributed to the battery drain. I don't have the details but I assume that by doing that it puts the Wi-Fi radio in cycle (faster poll intervals) until it senses connectivity thus draining battery. I'm assuming you've already restarted all networking equipment? If not, do so as good measure. Even more extreme reset network settings on iPhone if issues still persist.