I am new to all of this, and I am having trouble with my Verizon Samsung Galaxy S4 SCH-I545. I am on a Mac, but can also run Windows 7 in VMware Fusion.
A couple days ago, I successfully rooted my phone, by flashing it with odin. Several days after that, I successfully installed Safestrap Recovery, but did not do anything with it. Then I tried flashing a ROM for TWRP, and thats where my troubles started.
When I rebooted my phone, it constantly got stuck at the Samsung Galaxy S4 screen.
I tried wipe data/factory reset and wipe cache partition, but to no avail.
I can boot into the stock recovery (Safestrap got removed when I wiped my phone), and I can boot into fastboot.
When I boot it into recovery, it says
E:failed to mount /system (Invalid argument)
Then I tried flashing the stock ROM with Odin and it kept failing. (I may have done this wrongly, because I did not get a PIT file with my Stock ROM download, and therefore had to use a different one that I found for the I545)
I also installed SDK tools for Mac, and used terminal to sideload a ROM, but once it hit 100%, my phone says
E: footer is wrong E: signature verification failed
So here I am now: Terminal will connect to my phone when I select Apply Update From ADB in recovery,
adb devices - shows my phone fastboot devices - shows nothing adb shell - gives error 'closed' reboot bootloader - gives error 'closed'
I have tried using the following to fix the error 'closed' but again, to no avail.
adb kill-server adb start-server