iPhone 15 battery backup and network issues after iOS 18.4 update

I have recently updated ios version to latest 18.4 in my iphone 15. Since then my battery backup has degraded so much so that the phone ja not going 1 full day. Also the phone is having network issue and hence is getting severly hot while doung simple tasks like taking calls.


Please check and fix this asap. I think the jssue is ocurring for all the devices.



[Re-Titled by Moderator]

iPhone 15, iOS 18

Posted on Apr 4, 2025 11:37 AM

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Question marked as ⚠️ Top-ranking reply

Posted on Apr 7, 2025 10:08 AM

After an update, your iPhone must complete post-update background tasks. This is mainly creating and sorting a searchable database of your data. You can experience an increased battery drain and thermal temperatures from this. Give it a few days and when the tasks are complete your iPhone’s conditions will return to normal.


Also if you are having network issues this most certainly cause an increased battery drain. The reason being is because when your iPhone is not connected it will always continue to try to connect to a network. This uses full power and uses lots of energy. If you are ever in an area with low to no coverage, consider turning on Airplane Mode or turning off Cellular. But if you are in an area with coverage and you aren’t getting a connection, consider contacting your carrier for help.

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Apr 7, 2025 10:08 AM in response to Sandy___67

After an update, your iPhone must complete post-update background tasks. This is mainly creating and sorting a searchable database of your data. You can experience an increased battery drain and thermal temperatures from this. Give it a few days and when the tasks are complete your iPhone’s conditions will return to normal.


Also if you are having network issues this most certainly cause an increased battery drain. The reason being is because when your iPhone is not connected it will always continue to try to connect to a network. This uses full power and uses lots of energy. If you are ever in an area with low to no coverage, consider turning on Airplane Mode or turning off Cellular. But if you are in an area with coverage and you aren’t getting a connection, consider contacting your carrier for help.

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Apr 4, 2025 12:52 PM in response to Sandy___67

Sandy___67 wrote:

I have recently updated ios version to latest 18.4 in my iphone 15. Since then my battery backup has degraded so much so that the phone ja not going 1 full day. Also the phone is having network issue and hence is getting severly hot while doung simple tasks like taking calls.

Please check and fix this asap. I think the jssue is ocurring for all the devices.


[Re-Titled by Moderator]

Having network issue will cause battery issue, as your phone will keep trying to connect to a stronger cellular connection.

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iPhone 15 battery backup and network issues after iOS 18.4 update

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