Assuming you somehow use up your original data cap in… Let’s say one incredibly data intensive day somehow. That leaves you with (30 days * 24 hrs/day) * 3600 seconds/hr * 256,000 bps = roughly 660 gigabytes. So I guess that’s probably the limit? Plus your original cap.

I gave it a run on Ubuntu touch with a fair phone like 8 months ago… It was still pretty rough then.

A vacuum sealer would be more robust and look less janky than a Ziploc bag. You can get a used food saver for cheap!