Hello! A lot of Russian users (including me) reports that after Android 7.0 was installed from update center there is no more sim card.
Do you know about this problem and what is solution?

Me too,
Does not recognize the sim card

Did you try to remove the sim and put it back?

I have the same problem, and i tried to change the SIM slot but still no SIM detected.

I have the same Problem. I switched the Slot, but still no SIM detected.

Same problem and i tried it

Hello!
I was in the same situation.
Contacted support but no answer.
So decided to freely.

The following is my case. Thank you at your own risk.

Provide the following.

MTK USB All до v 1.0.8
Maui META ver 9.1604.02.00
SN_Writer_Tool_v1.1648
SP_Flash_Tool_Windows_v5.1648
OS Ver.20160822
OS Ver.20161025

If you lost the IMEI and may have information.
The Maui META run.

"The pc connecting Power offed BV6000"
"IMEI download"
"Upload from flash"

It's point.
If you OS ver is 7.0. It's mey be use OS Ver.20160822 MDDB_...
If you're lucky to revive. May be...
Note If revived.

It's a downgrade to OS Ver.20160822 by SP_Flash_Tool_Windows_v5.1648.

"format all + download"

It's point.
Don't forget checksum value .

Here to write IMEI by SN_Writer_Tool_v1.1648.
And update OS Ver.20161025.
And the wireless update to 7.0.

Good luck to you. Good luck to you.

Useful information of the bbs. Thank you.

And...blackview_admin. Thank you for the wonderful surroundings.

it seems you lost the imei. you can rewrite is with SN_Write_Tool_v1604