Hey Alexwho,
If I understand correctly, your signal strength could be better.
There are a few things you can do.
- Restart your iPhone, iPad, or iPod touch - Apple Support
- Check you iPhone Update latest version of iOS
- check for Update your carrier settings on your iPhone
- Finally reset your Network setting
- tap Setting
- General
- Reset
- Reset Network Setting
BE careful This resets Wi fi networks and passwords of wifi, cellular settings, APN Setting, and VPN connection
Best Regards
MAbdElaty