Connections Bug Out Randomly

[rydoginator]

Hello, I have the regular 7t model 128GB HD1905 and randomly, my phone will drop all connections. This is the 2nd occurrence of this issue, and I managed to grab a screen cap of it.
I don't know what causes it, as it happens randomly. 1st time I was on break at work, 2nd time I was visiting family for the holidays.
As you can see from the video, the SIM card is acting like it randomly disconnects/reconnects rapidly. Throwing it in and out of Airplane mode doesn't help, rebooting doesn't help; the only solution was taking out the SIM card, blowing inside the tray, and reinserting it.
The 2nd time it happened, I didn't have a SIM card ejector tool, but it seemed like it randomly went away.
I've had this unit replaced last week as it had a green tint defect, but my previous unit experienced this bug also.
I don't think it's an issue with the SIM card, as my OnePlus 6 reads my SIM card just fine for the previous year that I've used it.
Video of what happens: https://youtu.be/a1j-6o5ChLM

 

[krisbmeyer]

So I have a HD1925 otherwise known as the 5G McLaren. I had connectivity issues immediately with my first phone and I found that my mms wouldn't work, neither would voice calls if my carrier signal dropped at my house and I was connected to my wifi. So my new phone arrived, and voice calls will work on this phone but still no mms unless I'm connected to a carrier while on wifi. Don't have this issue work my regular 7pro. Neither does the rest of my family with iPhones. Haven't figured out yet what is wrong. Will update I've I find an answer.

 

[YrrchSebor]

I had to return the 6T because my LTE would disconnect/reconnect all day long. Now I have a 7T 1905 and had my first occurrence of this today in about 10 days. I'm REALLY hoping it was just a 1 time thing, or at least a very occasional thing. I'm on T-Mobile in the USA.