Is this happening elsewhere you go @Avas91 or is it always happening in a particular place ?
Try resetting your network settings in Settings > General Management > Reset > Reset Network Settings.
I updated to the May update yesterday and my signal and data connectivity is fine.
Daily Driver > Samsung Galaxy s²⁵ Ultra 512Gb ~ Titanium Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "
