Hi @Bilal-Hussain
You are certainly veering away from the intended use cases and design goals of VOXL 2 Mini, and instead we'd recommend you look at VOXL 2 so you can use add-on boards such as Eric mentioned like Microhard or a 4G/5G solution.
Modem performance with various base stations is operator/carrier dependent and nothing we can control nor provide metrics on. VOXL 2 can interface with many modems, so I think you might want to first do some modem analysis to see what modem solution will work for your intended use case and constraints.
From there we can help you determine which platform (VOXL 2 or VOXL 2 Mini) can work with your modem and carrier network of choice.