New NBH still doesn't let me access recovery, just like the previous one - it throws the same error, but this time with (4096 errors).
Attached zips of mtd0 and mtd1 pulled after fastboot boot recovery.img. adb still cant mount sdcard.
Btw. If I manually flash recovery image to recovery partition I am able to access it from lk, which leads to a question: does current GSM or previous universal NBH include recovery at all or should I keep on flashing recovery.img manually via fastboot? Your original instructions didn't mention flashing recovery.img at all and I'm a bit confused here.
Anyway, upon flashing recovery manually I can boot into it from phone and it seems like it's installing androidupdate.tgz. If I flash boot.img to boot via fastboot I end up with boot loop, but I tried just booting boot.img via fastboot without flashing it and it gets stuck at:
[21.628204] msm72k_udc: ept #2 out max:512 head:ffc0c100 bit:2
[21.696350] mdp irq already on 4 4
[21.714172] mdp_dma: busy
at this point I pulled mtd0 and mtd1 just in case
all zips attached - _new_nbh is with new GSM NBH using fastboot boot recovery.img, _fastboot is with manually flashed recovery and fastboot boot boot.img pulled when android got stuck.
Hope it helps.