Antenn-aid for your iPhone signal problem
Ok, i laughed when i saw this, maybe you’re doing the same thing right now but it might work.
So, let’s present to you this magical sticker. Antenn-aid is a vinil sticker specially create for the left corner of the antenna and it could improve your iPhone signal performance.
It costs $4.99 (6-packs) and you can buy it from etsy.com.