Phone has flickering and touchscreen problems (Jerry wheeler I need U)

Hi juan, sorry to take so long to get back to you.

It doesn't sound to me that the money and ID you put in the case would have been a problem; there's a fairly solid midframe covering all of the delicate internal parts so I'm skeptical what you did would have damaged the phone in any way.

Just to clarify, you're saying that you have to put pressure on the bottom of the phone or the display doesn't work, right? But the phone is still powered up and working otherwise; you just can't see anything on the screen, is that correct?

If you take a look at this picture from an ad on eBay, you'll see that the electronics built into the screen are all located at the bottom of the screen, right at the location where you mentioned you have to press to get it to work.

What that says to me is that you've most likely got a broken or loose connection between the actual LCD printed on the glass and the flexible ribbon cable connecting it to the motherboard. Unfortunately, that sort of damage isn't repairable so the only real fix is to replace the screen. I've been in exactly the same situation; my brother borrowed my wife's iPhone 5C and after having it for a few months the screen stopped working. He found that by taking a binder clip and putting it on the upper left corner of the screen, he could use the phone just fine. Once I got it back I ordered a new screen and replaced it, fixing the problem. So you might be able to get away with using one of those to maintain pressure until you can save up enough to buy a replacement screen.

With your phone there are basically two options for a screen replacement; with or without the frame. The recommended way is to buy a screen that comes already mounted on the frame, then you transfer the parts from your old phone to the new frame. Here's a video showing a teardown, which is essentially what you'd be doing. Note that they neglected to remove the vibration motor in this video, but otherwise you can do a full frame replacement using this video.

Realme 6i disassembly/Teardown

The other way to do a screen replacement uses a different procedure whereby you remove the screen from the frame. You'll need some glue or precut adhesive to resecure the display onto the frame, though. This video here shows how to do that kind of repair.

HOW TO Replace REALME C3 and 6i LCD Display using only simple tools I bought from LAZADA!!! - YouTube

Buying a screen without a frame will be only slightly cheaper than one with a frame, but that savings may well be offset by the cost of glue or adhesive you'll need for the screen. As I mentioned, the professionals always do a screen+frame replacement.

I realize you are very cost-conscious here, so my suggestion would be to check AliExpress for the most inexpensive options. I did a very cursory search and one of the first ones that came up was around $20 USD, which is a good price for any screen. If you dig deeper you may even find it cheaper.

Original Display For Realme 6i Rmx2040 Lcd 10 Touches Screen Replacement With Frame For Realme 6 I 6i Display No Dead Pixels - Mobile Phone Lcd Screens - AliExpress

Hope this information helps and was worth the wait. All in all, the TL;DR version is that your screen is probably bad and you most likely need to replace it. Let us know what happens with your phone and how it turns out.