try this solution


a customer brings me a phone, i trying to unlock/flash/etc it and only come to the

"
GUI v0.91373018/UNI
Card serial:0000XXXX
Loaded 49 flash descriptors
Open COM port OK
ChipID:8000,EMP protocol:0301
PHONE IS RET RETAIL PRODUCT
FLASH CID detected:29
Speed:115200
err: 45
loader prologue returns invalid status
failed to load CERTLOADERS,try to use RECOVERY.
Elapsed:2 secs.
"




A: solution steps

problem in software of ,better say, in man, who make that phone before you.
a certificate is mismatched inside phone, which is always bad.

what we need to do ? reflash phone properly.

first - press unlock

------------------------------
RECOVERY MODE STARTED
Recovery:041213 1452 MATCXC1326739_COMPACTCERTLOADER R2L
Fetching phone data from OTP
OTP status:0 locked:1 CID:36 PAF:1 IMEI:35841300****** CERT:RED
Recovery succefull. Reflash phone now
Elapsed:8 secs.
-----------------------------------
we can see - it is OTP RED36 phone, but firmware has RED29 certificate inside.
i NOT supporting such combination, because that is wrong.

now, after recovery, our phone is dead and we need reflash it.

but TAKE A NOTE - SELECT YOUR OTP CID in CID CHANGE droplist !

(i.e. red36 in our case)

then flash only main (if you know version) or just flash standart main+fs+complete.