An android phone ?

[irisblue]

My main working android phone is 3+yrs yes old. I use it a lot.
It now feels hot to touch on the top 1/4 of the unit. I am typing this on the back up from '17, that may catch a WiFi w/o phone #. It is connected to an unsecured Wi-Fi.
Tomorrow I'm thinking I'll need to go to the phone carrier & but another phone & a sim card for this unit.

I pulled the battery from the main phone, set it on an ice bag.

It is very warm here, 85+, does external heat cause phone problems as the phone ages?

Tia

[ItsjustMe]

1. The phone Is over 3 years old

You may just need a new battery.

[irisblue]

3. I use an in wall charger & have 3 batteries. And I switch the out. A hot to touch phone is not usual

For a dying battery.
And welcome to DU

[cayugafalls]

2. I agree withe the first post, also, you should not need a new sim.

You can keep your old sim and just pop it into the new phone.

But check the battery first. A hot phone sounds like battery problem.

[irisblue]

7. The 2017 phone is a larger SIM card, the newer phone is a nano SIM card. Good idea tho

[Galraedia]

8. You can actually cut the card to fit.

[Shermann]

4. Common failure mode with lots of possible causes

Software glitches can cause that. Any new apps installed recently?

Shut it down to cool off. Power it on and see if it does it right away, or if it happens randomly after a period of time.

[irisblue]

6. I pulled the battery, let it sit for 10 hrs. I have not added any apps.

Can software in a well used phone heat up?

I have used the phone for the last 15 min & it is warm to touch at this minute

[irisblue]

5. I broke the very small metal tounge in the charging port

A good while back. I charge & switch out batteries as needed.
It seems unlikely that 3 batteries would fail with in the same 3 days, given that were purchased them over a , 6 month span of time and have different manufacturer dates.