iPhone connection. Problems

On my I phone XR, I mostly use my cell data to get on the internet unless I’m near WiFi. it use to be I had no problems now For the last month. I keep getting no internet connection sign come up. Yet I can get into and browse google and Crome .I can also get browse face book and Instagram. What I can’t do is play my game that require a connection nor can I play music or get into U Tub.

had a diagnostic check done all is good. I’ve called apple support and went through all the tricks turning phone on and off , checked network. Every thing they had me do .I even bought and put in a new sim Card still no connection .

I’m at my wits ends I can’t afford a new phone and if I did I would most likely get an android. For now I have to baby this one and find out.. what should be an easy salutation to this very annoying problem is there any one that can explain to me step by step on How to fix this problem?

along with the what’s, why’s , and how’s of it all? Please I pray that there is some one out there that knows what is going on and knows how to help me with what seems like my RX iPhone’s tragic disaster .

thank u in advance for ur help

Richelle hear is annoyed and frustrated

signing off till next time . Hope to hear from some one soon.