CERT-FAQ-Information-Collection-TESTED-certs-(Don't-post-in-other-places!!!)

CERT = imei certificate = imei signature = imei key file.

Most of all 2014/2015 year samsung phone have new security regarding imei.
All phones out from factory with imei signature(key,cert) calculated in factory and stored in DB.

Qualcomm phones have more strong security and even not allow to read cert.
Exynos phones allow read/write cert.
SPD phones allow read/write cert.


Q>Why i need cert?
A>If phone EFS/NV(place in phone where stored imei/cert) erased/wiped, phone modem will not work correctly!!

Q>How i can check status of cert?
A>New phones have special code to check *#0011#




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Certificates file format for duos or if you want write only SIM2(IMEI2) Cert:

G530H cert should be DUOS like:

;Z3X Samsung CERT file
;Please do not edit this file
[cert]
Model=SM-G530H
IMEI=yyyy
ImeiSign=yyyyyyy
PubKey=yyyyyyyyyyyy
PubKeySign=yyyyyyyyyyyyyy
IMEI2=xxxx
ImeiSign2=xxxxxxxx
PubKey2=xxxxxxxxxxx
PubKeySign2=xxxxxxxxxxxxx


if you want write only SIM1 cert:
Model=SM-G530H
IMEI=yyyy
ImeiSign=yyyyyyy
PubKey=yyyyyyyyyyyy
PubKeySign=yyyyyyyyyyyyyy


if you want write only SIM2(imei2) cert:
Model=SM-G530H
IMEI2=xxxx
ImeiSign2=xxxxxxxx
PubKey2=xxxxxxxxxxx
PubKeySign2=xxxxxxxxxxxxx