Connectivity Issue

Hi,

I am using iPhone 11. I have a serious problem with the device in the connectivity. Whenever while using wifi on the mobile if I turn on bluetooth it interferes with wifi and I lose signal. Then I have to turn off wifi and again turn on for the connection.

I am seriously unable to use wifi when my Bluetooth is On. I don’t know why this is happening and my mobile is just about 5 months old.

Can someone help me troubleshooting the device or is it the only way that I have to replace the device from Genius store.