[Android Central Question]

infinix note 2 wi-fi can't connect with stability as bought because mac address keep changing and the wi-fi network has this note NVRAM WARNING: Err=0x10. please can you help had done factory reset yet to no result.

[hallux]

That shouldn't be changing, it is coded into the hardware as it's actually the hardware address for the phone/device. If there is a fault with the WiFi MAC address, there's a chance the WiFi in that device is going out, and there isn't much that can be done to resolve it.

[Rukbat]

Unless he got the latest update (it's only been out since yesterday, though) - there's a switch - I think in Developer Options - to change the MAC address on every connection. Something like Chainfire's Pry-Fi. Every time you enter the store, you're someone else. (That's going to drive the marketing schemes of some stores nuts.)