Note that this can act as a Faraday cage around your phone and potentially reduce your reception.
With the fullback of my phone covered in copper I got ~0.2 Mbps on 4G. When I removed a 1 in.² on the upper left (where the antenna is on a Google pixel 3) it went up to 13 Mbps.
I assume having everything except for a small square covered is still pretty good, so I’m doing that.
Note that this can act as a Faraday cage around your phone and potentially reduce your reception.
With the fullback of my phone covered in copper I got ~0.2 Mbps on 4G. When I removed a 1 in.² on the upper left (where the antenna is on a Google pixel 3) it went up to 13 Mbps.
I assume having everything except for a small square covered is still pretty good, so I’m doing that.