Oppo f1 plus has serious issues with bluetooth, If you have a 4g sim in oppo f1 plus, then the bluetooth is not working. First of all it will take ages for the device to find the bluetooth device( yes my device was a bluetooth 4.0 device but still is took around 3-4 min for oppo f1 plus to find the device) . Then it wont connect in the first attempt. You have to try more than once to get it to pair. And when it pairs the streaming of the sound is horrible. The songs breaks while playing just like its buffering and I was playing locally stored songs on the phone memory.
Now I you turn on the airplane, or remove the 4g sim or insert a 2g sim then the bluetooth works fine.
Another interesting thing I notice about all oppo phones is that its wifi mac address is identical to bluetooth mac address. I have never seen these two addresses to be same on any other phone.
There has been no fix for the bluetooth problem wth customer support, oppo community or the service center people. And its not a problem with my particular oppo f1 plus, we have tried around 5 other brand new oppo f1 plus handsets all having the same problem if a 4g sim is insterted into the phone then the bluetooth is not working.
If anyone of you have a fix. please share. the only fix is to turn on the airplane mode. but then there is no point to have a volte phone with a 4g network.