At my wit's end.
I realize it's been 2 weeks since you posted but, in the hope that you are subscribed still Radioman66, I'm curious if you did ever manage to fix/reinject your IMEI; I'm Canadian too btw, though I bought my Nexus 5 through Google Play. I've tried flashing stock everything: bootloader, radio, boot, system, cache, userdata via fastboot; only then did my phone reboot properly, but it still has a habit of crashing/rebooting every so often. No IMEI & no cellular reception thus far, so I can only conclude that there is some data corruption at play here. Fortunately it was easy to find my unique IMEI via a sticker on the inside of the back cover of my Nexus 5, for those who aren't aware.
So I'm in the opinion that the issues of bootloops and my IMEI corruption (dialling *#06# on the dialer calls up a bold IMEI header but no number whatsoever) first occurred when my battery drained to zero. I was using a custom rom at the time, Optipop Dark Deodex with f2fs formatted data and cache partitions, + Multirom & multirom compatible TWRP. I'm at a loss for why the EFS partition and thus IMEI would even be accessed by the phone for writing/reading or how a corruption of the partition could even occur. Perhaps I was receiving a text message right at that very moment it turned off? Perhaps f2fs is to blame, who really knows...main thing is my IMEI is corrupted and I'm left with a smart brick, it being no longer a smart phone.
Anyway, long story short it's been like 2 days of searching around but I think this free tool "Setup DFS 15.01.17.0.zip" at cdmatool dot com (can't post link as a newbie so replace dot with a period) may be the real deal; it's possible to download it without registering i.e. demo mode ( which makes you wait tens of seconds between operations). Despite my general comfort with adb, fastboot, cmd tools in general, the CDMAtool's manual is full of stuff and acronyms I don't really know about yet, like COM Ports and what not but I'm hoping to soon understand this tool and will report back my failures/successes. If anyone would be kind enough to perhaps walk me through what I would need to do, I'd be super thankful!!!t
Welp, cheers to not even knowing about the existence of ESN/EFS/IMEI before this unfortunate juncture LMAO--I will definitely make sure to backup my EFS partitions before flashing custom roms from now on...
Last edited by aNANOmous; 4th February 2015 at 08:43 PM.