Can you try remove your casing?

Seriously guys have you tried to remove the casing and leave the phone naked and see how the connection goes?

last week i have disconnection problem when tethering. i had to connect and reconnect the cable everytime.

In the house with wifi also most of the time the phone cannot switch to wifi quickly like before when i reached home from work. Sometime it doesnt automatically connect to my home wifi at all.

Then one day i removed that stupid bumper casing and left phone naked. Now i dont have DC or wifi problem anymore.