So, I purchased two Samsung Galaxy S5 phones from Amazon a while back. I have been playing around with the first after reflashing to a different firmware version - no issues arose. However, when I went to reflash the second phone with the same firmware image I used on the first the phone refuses to complete the boot sequence.
I am able to shell into the device during its boot sequence, but the phone never gets past the Samsung animation. Further inspection of their original packaging indicates that they may be from two different regions.
Now, is there a method for determining the correct firmware version (with respect to locality/baseband version) in order to recover the phone after the original firmware has been wiped? I have been trying various versions of Samsung G5 firmware, but all give the same unbootable result.
tl;dr Assuming no firmware is loaded and we have only the original bootloader, what are the recovery options? Even if I must first use some Samsung tool to recover to the latest version, this is fine.