Hi,
so I'm using some Samsung Galaxy S9 to measure GSM networks (like 50 pcs). Out of box; some S9 don't have OEM UNLOCK option (or the option is OFF and grayed out) and some have RMM STATE PRENORMAL, both options make use of the phones impossible (I use custom boot and fw). I made like one week research on this topic; found only some "standard" information mess and few guides. Just want to share how I fixed my problem.
Always try on fresh FW or after wipe (...fresh FW is preffered...).
1. If You have a phone that have OEM UNLOCK option not visible or grayed out, at first try to connect to network (WiFi / GSM) in most cases OEM UNLOCK option appears after few seconds, and in some cases phone restart is required. This helped me in few cases.
2. If first step didn't help then try to do date changing trick, there are some guides, but in short:
- make sure that GSM / WiFi networks are OFF, in [General management] > [Date and time], turn OFF [Automatic date and time] and change date back more than 7 days (ieg. 2 weeks or one month)
- turn on network (GSM / WiFi), make sure that the date didn't update after network ON (if it did, just repeat), go to [Software update] and click [Download updates manually], at update screen choose [LATER], after this under [Download updates manually] there shoudl be "Last checked on 99/99/9999" and shoudl display date You have set
if after this the date is actual not that which You choose, then wipe the phone and try again, if after few tryes there is no result, then this trick won't work on this phone
- restart phone and turn ON [Automatic date and time] , and then click [Download updates manually] and also choose [LATER], "Last checked on 99/99/9999" shoudl be actual date,
now restart the phone and check if OEM UNLOCK option appeared...
This trick/method worked only on 1 of my phones, so for S9 it's bad... it worked better on S8.
3. This is rather as bonus, it's useless for me, but maybe helps someone. Sometimes, doing firmware update via OTA ([Software update] > [Download updates manually]) OEM UNLOCK appears after update is is done. So, flash phone with older FW, an then do OTA update. This one did the trick few times.
As for RMM STATE PRENORMAL, method 1, 2 and 3 helps... but NOT always... it's a real pain... so...
4. This method helps with OEM UNLOCK OFF and RMM STATE PRENORMAL states (afterwards OEM UNLOCK is ON, and RMM STATE is NORMAL). Success rate was 100% in my case (3 out of 3 phones, other methods failed badly). One thing is weird, I'v found only 1 mention of this one... well, spoiler alert, it's paid, but gets the job done.
Just go to chimeratool.com, get paid trial version... than just few clicks and one minute later... viola! All done and working... real shock for me... afer week of research...
(I'm not paid and/or related to Chimera tool, just want to help others)
Hope it helps and clarifies some things!
Regards, Doman.
PS: as for SAMSUNG... shame on You for this stiupid lock...!
so I'm using some Samsung Galaxy S9 to measure GSM networks (like 50 pcs). Out of box; some S9 don't have OEM UNLOCK option (or the option is OFF and grayed out) and some have RMM STATE PRENORMAL, both options make use of the phones impossible (I use custom boot and fw). I made like one week research on this topic; found only some "standard" information mess and few guides. Just want to share how I fixed my problem.
Always try on fresh FW or after wipe (...fresh FW is preffered...).
1. If You have a phone that have OEM UNLOCK option not visible or grayed out, at first try to connect to network (WiFi / GSM) in most cases OEM UNLOCK option appears after few seconds, and in some cases phone restart is required. This helped me in few cases.
2. If first step didn't help then try to do date changing trick, there are some guides, but in short:
- make sure that GSM / WiFi networks are OFF, in [General management] > [Date and time], turn OFF [Automatic date and time] and change date back more than 7 days (ieg. 2 weeks or one month)
- turn on network (GSM / WiFi), make sure that the date didn't update after network ON (if it did, just repeat), go to [Software update] and click [Download updates manually], at update screen choose [LATER], after this under [Download updates manually] there shoudl be "Last checked on 99/99/9999" and shoudl display date You have set
if after this the date is actual not that which You choose, then wipe the phone and try again, if after few tryes there is no result, then this trick won't work on this phone
- restart phone and turn ON [Automatic date and time] , and then click [Download updates manually] and also choose [LATER], "Last checked on 99/99/9999" shoudl be actual date,
now restart the phone and check if OEM UNLOCK option appeared...
This trick/method worked only on 1 of my phones, so for S9 it's bad... it worked better on S8.
3. This is rather as bonus, it's useless for me, but maybe helps someone. Sometimes, doing firmware update via OTA ([Software update] > [Download updates manually]) OEM UNLOCK appears after update is is done. So, flash phone with older FW, an then do OTA update. This one did the trick few times.
As for RMM STATE PRENORMAL, method 1, 2 and 3 helps... but NOT always... it's a real pain... so...
4. This method helps with OEM UNLOCK OFF and RMM STATE PRENORMAL states (afterwards OEM UNLOCK is ON, and RMM STATE is NORMAL). Success rate was 100% in my case (3 out of 3 phones, other methods failed badly). One thing is weird, I'v found only 1 mention of this one... well, spoiler alert, it's paid, but gets the job done.
Just go to chimeratool.com, get paid trial version... than just few clicks and one minute later... viola! All done and working... real shock for me... afer week of research...
(I'm not paid and/or related to Chimera tool, just want to help others)
Hope it helps and clarifies some things!
Regards, Doman.
PS: as for SAMSUNG... shame on You for this stiupid lock...!
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