If your iPhone will not update after a Battery Replacement, is giving a Unable to Verify Update this may be the article just for you.
If you have recently done an iPhone X Battery Replacement, 11 Battery Replacement or even an iPhone 12 Battery Replacement and the App IOS will not update and displays Unable to Verify Update this may be why. I recently installed new batteries in to 3 iPhone 12’s. I was contacted shortly by the customer saying that 2 of the iPhones would not update.
iPhone Beta Updates
Upon further investigation, I discovered that the customer had Beta Updates activated on her iPhone 12. As many know, Beta releases are Pre-Release versions of upcoming or test software, which may contain bugs or new code, which may cause performance issues and may be unstable. I told her to switch the Beta updates off. This then meant that the phone would be looking for the next regular update, which was IOS 16.6. 
The customer had automatically update my iPhone enabled, so the next update downloaded and then when it tried to install, popped up with the following error Unable to Verify Update. What was strange is that she already had IOS 16.6 installed, but it must be the Beta version as Beta updates had previous been enabled. This lead me down a rabbit hole of trying to work out what the problem was.
Are you a Guinea Pig?
Why Enable or Allow Apple IOS Beta Updates to be Enabled? Straight up, I have no idea why a customer would have Beta updates enabled, but the more pressing question is why does Apple allow Beta updates to be enabled on the latest iPhones? I would imagine that when switching Beta updates on, that the iPhone owner will have to agree to a whole bunch of terms and conditions which they do not read. Apple knows that literally no one reads the agreement which we all enter in to them to use Apple devices and software. Could Apple be using unsuspecting customers as their Beta testers? Well, I would not put it past them, I mean what better way to test real world applications of your software and devices than to have maybe even millions of your customers as your test subjects?
Does the Beta version of IOS stop updates when Non-Apple components are Installed?
If Apple were not so crap and expensive when it came to post sales repairs, there would not be much of a market, but there is, so they expend countless amount resources on trying to make it as difficult as possible for independent repairers to repair their devices. This leads me to wonder if Apples IOS Beta version is being tested to detect Non-Genuine parts and to then stop the IOS from updating. Anecdotal reports from iFixit and my battery supplier point to this being a possibility. Here is the iFixit thread on this whole issue for more context.
What is the Solution?
As of the date of this article being published, IOS 16.6 still works and updates when an iPhone X Battery Replacement, an iPhone 11 Battery Replacement or an iPhone 12 Battery Replacement have been done with Non-Genuine Apple spares, but not when the iPhone is running 16.6 IOS Beta version. My battery supplier has contacted his battery supplier and they have also updated the battery circuitry / software to overcome this problem when the iPhone is running Beta IOS, which makes me unsure as to the real cause of the issue. Late I have not tested the updated batteries on IOS beta.
Play it Safe / Fix the Problem
This is my take on how to avoid this issue. Firstly you should be using a good battery supplier, one that works to resolve problems like this. I can say without a doubt that most of the cheap batteries out there will not have updated their batteries to deal with this issue. Secondly, it is not not necessary for customers to be running IOS Beta version, simple as that. The only 2 ways to solve this problem if you already have a Non-Genuine Apple Battery installed in an iPhone X, iPhone 11 or iPhone 12 which was running a Beta version of IOS when the battery was installed is to replace the battery with one that has been updated to deal with the Apple Beta version of IOS, or return the iPhone to factor settings and re-install the latest Non-Beta IOS. Remember to ensure the device is backed up to iCloud before you do this.
