question about downgrading because of FRP bypass

[disturbed]

hi there.

we all know that new build are coming with new security and if i cannot do my job with octoplus frp or youtube videos it`s an idea to downgrade.

What are the conditions with smartphones with new androids. for example is there a rule i cannot downgrade android 8 with 7?/at all with previous big version/

now i have one p20 lite and one p30

[X3non]

hi there.

we all know that new build are coming with new security and if i cannot do my job with octoplus frp or youtube videos it`s an idea to downgrade.

What are the conditions with smartphones with new androids. for example is there a rule i cannot downgrade android 8 with 7?/at all with previous big version/

now i have one p20 lite and one p30

this security feature is called anti-rollback, and you'll have to do some research as to if a certain mode has this or not
both devices you mentioned don't come pre-installed with anything below android 8 and 9 respectively, you can't possibly downgrade either device to android 7

[disturbed]

can you link me the oldest firmware i can install on p30?

[X3non]

can you link me the oldest firmware i can install on p30?

what is the build number of the oldest firmware for this model?

[disturbed]

what is the build number of the oldest firmware for this model?

I hope that you will tell me that

[hovatek]

I hope that you will tell me that

That would depend on your variant. If you're flashing an OTA / SD card format firmware then those don't play so well with downgrading

[disturbed]

now i have samsung s9/g-960f/ and want to downgrade it as lower as can. can i safety downgrade it with odin and could you give me url with the needed software ?

/ i want to understand my job and to be able to handle with this frp stuff and not to waste strengh to go to colleges and they take me my money.

thanks

[disturbed]

maybe i should begin using youtube a little more

[hovatek]

now i have samsung s9/g-960f/ and want to downgrade it as lower as can. can i safety downgrade it with odin and could you give me url with the needed software ?

/ i want to understand my job and to be able to handle with this frp stuff and not to waste strengh to go to colleges and they take me my money.

thanks

Yes, you can downgrade to a firmware with the same bootloader version, not lower.
What is your phone's AP? Dial *#1234#

[disturbed]

in recovery i see
10/QP1A.190711.020/g960fxxucftk1

Dial *#1234#
this execute nothing in emergency mode

please tell me which exactly firmware to download.

i have wrote on youtube too but you know the client are asking "today? tommorow?" and if they dont answer me i am with empty hands

thanks