I bought my second P2 today. It has the same sound interference issue as my first one
To reiterate, when listening on headphones and the volume is low (like listening to chillout or classical, meditation etc.) there is electrical type interference sound. I have been experimenting and have isolated to problem to WiFi. If I turn WiFi off on the phone it stops altogether. Also, I think that the more data that's transferring, the more interference.
It is there whatever is playing - music, Netflix etc. Even when notifications play it can be heard. Obviously if the volume is turned up it is far less/not noticeable but it is always there.
I have managed to capture a recording of the issue:
https://youtu.be/r0z6X7zB-pw
This was at low volume as it illustrates the problem best but it's clearly heard in the recording.
I captured this audio by using a 3.5mm audio cable to output the audio from my Lenovo P2 to the AUX-in on a speaker system. I then placed another phone next the speaker to record the audio using an audio recorder app. The uniform static background hiss is produced by the app.
I LOVE everything else about this phone but as someone that uses my phone for music for many hours a day I cannot ignore these sounds.
I find it hard to believe that I can be unlucky enough to get two faulty P2's so there must be many more with this issue if not all and no-one else has noticed the issue yet.
I have tried 4 different sets of headphones and the issue is the same.