I have a Micromax Canvas A1 with unlocked bootloader and TWRP 2.8 installed through fastboot. It seems I have no OS installed(I came to know through TWRP and bootloops). But I managed to install TWRP...I also managed to put the .zip file to root of SD CARD. But when I try to install zip through twrp...it shows failed error...this is the same case with stock rom .
Points to be noted
+) i have Unlocked bootloader
+)i have Twrp installed
+) Twrp shows unable to mount system and data
+) Unable to flash stock rom through SP Flash tool (stops at 6% ...Even though I tried 2-3 times)
Pls provide a solution to flash the Lineage OS 15.1 ROM...if not...stock rom will also do....
Here are the TWRP screen messages..