Answer calls - buttons instead of slider on lock screen

If the iPhone is locked and you receive a call, then you will see the slide to Answer option. If the iPhone is unlocked and you receive a call, you will see the answer and decline buttons. There is no setting to change that. Your decision to change to Android is your own, and we participants here are fellow users, and have no stake in what you decide to do or not do. This is a user to user support forum and Apple does not participate here.

There is the possibility that while in your pocket, the phone is getting bumped before a call and that could be what is getting the button to show up instead of the slider. It is hard to say. I'm not aware of it being a bug, and have not read of any other reports of this. It sounds from your second post that this does not always happen, so it may be hard to duplicate. Can you test calls to your phone from another phone near you to see what happens? Otherwise, you can make a Genius Bar appointment at the nearest Apple Store to have them check the device.

Hi, I recently opened a thread about this problem too, I have the same problem, I reported the problem to the support and I also sent a video of the problem.

Sounds good. To be honest, I always update via iTunes. After spending a lot of time here, I find many threads complaining about issues with over the air updates. I know a lot of people have success, but I like the ability to download the update via iTunes and expand and verify before doing anything to the phone. Just feels safer to me. Good luck.

In early November I opened a report via feedback assistant, I attached a video of the problem. I also opened a case with telephone support and I sent the same video of the problem, I was told that they have to check it. Other forums in other countries talk about it. From what I have noticed it is difficult to record, as it seems to occur after some time from one call to another. You can send a report via https://feedbackassistant.apple.com/ and also if you can, attach a video of the problem. You can also open a case like I did, with telephone support.