Advertising on the smartphone of unclear etiology. What is the reason?

Good time of day. Do not kick immediately and do not send to read mana - question from almost LAMER.
Happened and continues incomprehensible garbage. Husband bought a smartphone over the Internet, smart actually the Lenovo Vibe X3. The unit itself is good and serviceable, but the firmware is some kind of heresy. If the Internet telephone is off - everything is OK. Only include - all is crumbled. Push notifications, pop-UPS, any other rubbish. There are only custom apps, viber with Skype Yes, the toy that the case does not apply, since is rained before installation.
Question three:
what it can be;
- where it sits;
- how to get rid of it.
Your speculation about the roots of this evil state will not, because they are no stupid. No, I can only assume this is unfriendly, the Chinese push in the phone a "bomb", but to me it still does not. Firmware is worth native, did not touch even only for the reason that the husband has two SIM cards, and data is purely on the phone for a long time then merge everything on the computer and back. And different ed blocks the effect is not given, and the antiviruses that don't see anything, as far as I could understand.
Actually, help, than can.
2 answers
June 14th 19 at 20:25
I have almost the same situation (sizepolicy phone sending SMS, apparently to premium rate numbers, but they were not, as the Chinese were) helped Kaspersky. Also by the way Lenovo was Vibe Z. No third-party applications has not been established, the module was in the firmware.
Husband tried Casper, said that it seems that even there is something left, but the tangible sense or not. Advertising is still present. - Marshall5 commented on June 14th 19 at 20:28
sizepolicy phone sending SMS

I have Lenovo s820 was the same, apparently this is a common problem with SMS from Lenovo - aliya.Miller82 commented on June 14th 19 at 20:31
, Lenovo well lit even in the case of UEFI malware to their laptops - and they are officially recognized and made a patch, so there is nothing to be surprised ))) - jude.Farre commented on June 14th 19 at 20:34
June 14th 19 at 20:27
Reflash the normal firmware. Chinese Express Chinese. What and how - look at 4pda. If not confident, contact service.
Well, this is not always possible - for example on Lenovo k910 (dual SIM) was not the official firmware with the Russian language. Was just on the PCT version odnoimennuyu with 4G, but they did not fit.
By the way, the version with the virus to your k910, I took it on 4PDA - the author of the firmware did not recognize the presence of the virus, but version promptly removed. - Marshall5 commented on June 14th 19 at 20:30

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