Cellular data failed (iPhone 8)

Exactly, but only the front screen was connected, but apparently an issue with the "LogicBoard" something about a bad imei reading to the "logicboard" failed. Now the motherboard is apple branded and an OFFICIAL motherboard, I dont see how a third party replacement screen would've been that issue when i had my screen replaced 4 hours prior to going into my appointment, therefore i had the issue even before my screen was replaced. Leaving me confused, when I look over warranty and I see this "(c) to damage caused by use with a third party component or product that does not meet the Apple Product’s specifications (Apple Product specifications are available at www.apple.com under the technical specifications for each product and also available in stores); " Like I said, I had this issue BEFORE I even replaced the screen, so I dont see where this would be under "caused by 3rd party components" this all originally started from the ios 12.1.2 to iOS 12.2 and somehow my phone could not communicate properly with the "LogicBoard".... This is a software issue, causing a hardware issue and apple declines to service it because of a third party screen install. If that's the true case.. I'll slap back on their OEM screen and bring it back in all cracked up. This is honestly ridiculous how apple treats their devices. I understand if it's like "Oh, third party installed a new motherboard" but a screen??? A screen?!?!?.