Phone no longer connects to cellular service after restart.
A few days ago, I restarted my phone after clearing some data on my device in an attempt to save storage (my phone was warning that my storage was low, so I deleted the phone's cache and the "Android" selection in the storage's "Miscellaneous" grouping after making sure all apps and/or media that could be stored on the SD card was.). As it finished rebooting, I noticed it failed to play the T-Mobile jingle as it normally would while rebooting. Upon completing the reboot, the lock screen displayed "Service Disabled" and the cellular service bars on the upper-righthand corner showed no connection. Settings won't allow me to turn on my mobile network, or even select it as it's now grayed out. It does not recognize what mobile network it should be connected to in the "About Phone" section of Settings. Additionally, the phone will not play any audio from any source, despite audio being on in the settings. It won't play ringtones, notification alerts, alarms, etc. It won't even play video files with audio in any applications (showing playback errors or just failing to play despite loading the file), in addition to locally stored videos.
I have tried restarting the device, removing and reinserting the SIM card and then restarting the device, and I just completed a factory reset, all to no avail. I am unsure of how this failure has occurred. I had believed it was a software issue, but after the factory reset I now assume it must be hardware related. I have no idea what the problem could be, or what steps I should do to fix it. I have disassembled my phone to see if anything seems amiss or damaged. The headphone jack seemed loose where it rested, but I didn't notice it until a ways into disassembly and can't rule out that it became dislodged from said disassembly. Besides a normal amount of human refuse from years of use, nothing seemed out of the ordinary in the phone's internals. Short of replacing the motherboard, I'm stumped. Any help would be much appreciated.
Is this a good question?