About repairing tiny tech tools:
It can take a lot of time to orient one's perception to such a tiny and precise 3-D "operating theater," especially adjusting one's tactile sensation to a fair level of precision! Be kind to your self; if you're too hurried, and perhaps !#^&@@ off at loss of convenient function of a costly tech-tool, that, like all created things, is subject to Entropy ( the natural progress through time towards disorder), you very well might do damage to the tiny fragile components inside. ..... I mean in the PHONE, right?
I use a small speaker-magnet, or any small magnet. The screws stay put, while I plead with, or yell at other phone-stuff. By the Way... use no rare-earth element magnets; they won't let go of the screws, which can therefore fly out of your hands! Ah, the site says "too long!" A successful Blather! I have enjoyed this! Thanks, all you beings!