Dear all, yesterday I received the Xiaomi Mi 5 Prime. When I ordered the phone I sent a message to retailer in order to install the global rom with the OTA ability. When I started the phone I noticed that it has the global rom 184.108.40.206. However, there is one problem. When the phone has the screen ON, the Mi 5 emits high frequency static noise. If the screen is OFF, that noise disappears. I also noticed that the frequency varies if I use the phone (web browsing, using google play store, using camera). I suspect that this noise is coming from the ear speaker. I must also note that currently there is no sim card inside the phone. Has anyone noticed such problem with his phone? Is the problem with hardware, with global rom? Should I install global rom 220.127.116.11? Should I send the phone back to retailer? Please advise me on this problem. Thank you all for your answers!