I'm not sure if you can do it without pc. I do know that you can wirelessly transmit ADB commands , however i suggest you look into it and test if it works. I don't recommend doing this without a pc. PC is more reliable so try to do it that way or try to get hold of a laptop if possible.
If you have a recovery installed use "advanced reboot" to reboot into recovery and then use "install from sdcard".
I had a new restart, this time when taking a photo in GCAM, and when the photo was being "processed" by the Camera app, my phone restarted and didn't save the photo.
/* Your warranty is now void. * * I am not responsible for bricked devices, dead SD cards, * thermonuclear war, or you getting fired because the alarm app failed. Please * do some research if you have any concerns about features included in this ROM * before flashing it! YOU are choosing to make these modifications, and if * you point the finger at me for messing up your device, I will laugh at you. */
190R.BountifulDistantHapuka - https://camera.aeonax.com/#predownloads
i'm using Global 13.0.5 Firmware... no issues at allThat firmware is region specific. Please only use the EEA firmware recommended.