Chosen Solution

The phone itself is completely functional, but the display is laced with lines and makes it very difficult to see what I’m doing. I can still receive texts and calls, and even my Instagram is working. I believe this started after I dropped it on a concrete surface. Is it fixable, and how much would it cost to fix it?

Yes its fixable .You have damaged your LCD . these screens are quit cheap less than 30 dollars on ebay This video will help with the screen replacement https://www.youtube.com/watch?v=mZvZeVKl… not the exact phone but very similar . Your battery may be glued in so removal will be slightly harder. Hope this helps