Nokia India — nokia 6 - ringtone issues after 8.1.0 update

Address:

Hyderabad, Andhra Pradesh

I have purchased nokia 6 via amazon in september and it ran good for some days, after the first release of android 8 (Oreo) update issues started like overheating, phone hang up, call drop etc and i gave the phone to service center and they told that the problem is resolved.
Note that they have given any info on what they did. To me it looked like factory reset.

After this the 8.1.0 has been released and now the problem is that the ringtone which plays for an incoming call is ringing at the least volume for maximum calls. If i do the hardware test as instructed by call centre the test are passed.

I have purchased 3 mobiles to my family and all of them are having the same issues.

Imei of my device: [protected] & [protected]
Latest updated to android 8.1.0 on 01.03.2014

So i request to have a permanent solution for this which may be an update / patch for the software and even then if this is not solved device replacement. There are no physical damages to the phone.