Internet for the Pi

[ithanium2]

Hello, I am a beginner and I need some advice regarding an internet connection to the Pi.

I need to setup a raspberry pi with a Pi NoIR camera to broadcast video from a remote location.
There is 4G mobile coverage on that area.
So...I suppose that my options are either a 4G USB dongle or a 4G HAT.
I searched forums around here and I saw most folks use USB dongles with usbmodeswitch and wvdial (https://www.thefanclub.co.za/how-to/how ... and-wvdial), but many had issues?
The advantages of a dongle...I guess it's cheapest option?

I also researched and found a 4G HAT for the Pi - https://www.waveshare.com/product/mini- ... 4g-hat.htm
Things I noticed about it:
- its quite pricey...but cheaper than other 4G HATs on the market.
- it has GPS module which could be useful to me.
- it is powered from the Pi (3.3V or 5V option) tho I am abit confused how this works
I am confused abit on how this HATs actually work. On the description it states something like this:
UART selection jumper:
A: access Raspberry Pi via USB to UART
B: control the SIM7600 by Raspberry Pi
C: control the SIM7600 via USB to UART

Why does this HAT seem interesting to me? Well apart from the GPS feature, it might help me connecting to the Pi without the use of a DNS server? I am thinking something like the Pi could send me it's assigned IP address from the carrier via SMS.

What do you guys think?

[tpyo kingg]

I am thinking something like the Pi could send me it's assigned IP address from the carrier via SMS.

Neat idea.

You'd probably have to make some arrangement with the carrier to have an external IP address which is reachable from the net. But that will probably cost a bit extra.

Otherwise, you are mostly have an out-bound only connection behind several layers of NAT, assuming they they give you only IPv4 and no IPv6 on the side. If that is the case you'll need an external server to act as a base for either a reverse tunnel or a VPN. Or you could NAT-punch by setting up an Onion service.