Who I have the same questioned this topic

When sending a text message using Google's texting app on my note 9 running Android 9 I often get the invalid teleservice error and there is also another error I get but I can't remember as it's more rare.  Regardless if results in the text failing to send.

The only way to fix it is to enter airplane mode then exit it or reboot.

I also have call issues... I'll have full 4g service (and I've never had this issue before the note 9 and more specifically the Android 9 update).  I'll be talking to someone and I can hear them crystal clear but they can't hear me.  This happens a few min into a call and seems random.  I never lose service according to the phone and I can immediately redial or receive a call again after I manually end the call where the person can't hear me.

Since I have multiple issues and they are all service related (calls, text, data) and the only fix which is temporary is a reboot I think there is something wrong with my phone's antennas.

I'd like to get this fixed considering how expensive the phone is and it should still be under it's year warranty since I bought it in Nov 2018.

If I bring the phone to a Verizon store they chances of them being able to replicate the issue are likely small unless I stay there for a couple hours or more.

If the issue is replicated what will happen?  Will I get a refurbished phone someone else had on the spot or will my phone be fixed?  I'd prefer my own phone back obviously, especially since it's in perfect condition and the last time I got a refurbished phone from a warranty issue it was all scratched up and dirty.

Thanks in advance.