iPhone 11 lagging after iOS 18.1 update

Bibekbashyal wrote: "I have installed latest iOS 18.1 after that my iPhone 11 is lagging..."

Bibekbashyal ~ The long process of applying an iOS update to an old iPhone with a weak, aging battery can be the proverbial "straw that broke the camel's back." So...

Does your iPhone 11 still have its original battery?

And what's the Maximum Capacity % here?...

Settings > Battery > Battery Health & Charging

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You can’t downgrade, but you can update to 18.2. The lagging has nothing to do with the version; if a version universally caused iPhone to lag you would see thousands of posts about it, and news stories in the technical press worldwide. Thus, the problem is with your specific iPhone, not a problem with the update.

Things that can cause lagging:

• Apps that you installed to “clean” your phone or protect it against viruses and other malware. None are needed, and all any of them do is enrich the sellers.
• Installed VPN-remove it and its profile.
• Insufficient free storage

There are probably others, but these are the most common.

Bibekbashyal wrote: Yes it has its original battery with 85% Battery health"

Although that's above Apple's suggested level of 80% for battery replacement, that original iPhone 11 battery is several years old and so unlikely to be healthy. Apple has their own method for definitively testing the battery's health:

iPhone Battery Service

About genuine iPhone batteries

Repair Provider Verification

(Articles found by searching Apple's Knowledge Base.)

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Bibekbashyal wrote:

So, what should i do now?

how can i fix it?

I am suffering from this problem, even when i am texting this comment i am facing mistouch in keyboard. Plz guide me!

Have you tried all of the suggestions I already posted?

I was having the same on iPhone SE 3th gen. ... And than it stopped. I think u need to download newer versions of iOS and that can help very much

Jzapko

How old is that phone?