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Zaid

DUDU-Meng
does this have Google services installed?

DUDU-Meng
yes, it appears after downgrading, I downloaded the files from this forum

This is my device model
Model: LS S3/ UIS7870 8-core/12+256/1920*1200

i don't know what you mean by that, but for me this is the only english forum that i was able to find and now im seeking for support if possible. I added you on telegram we can talk if needed.

domestic, jd.com

im in china, i bought the device through JD, after the downgrade i selected English and there were no other settings for region.

DUDU-Meng
I think i might need some help, i don't want to open a new discussion in this but let me explain what happened.
I tried to downgrade to OS 3.5 global version (I was on Chinese version) now my device is stuck with screen that it requires activation. any idea what to do?

I have the same exact problem, I've tested with both wired and wireless connection.
The thing here is just facetime calls that are not working, but if you use whatsapp / WeChat calls they work. so this confirms that there are no issues with the mic.