Before everyone grabs their pitch forks....as someone who does telemetry tracking devices, 350megs/mo is pretty easy to do and send nearly 0 data, if you do it wrong....let me explain:

TLS connection setup is ~10k so if do an 1 HTTPS call/telemetry that's 48 calls home/hour. (11,600/10k = 1,160 https connections/day. There's 1440 minutes/day) Of basically calling home every minute and sending not much.

Ok calling home every minute...but maybe when idle that's not bad for notification updates?

We run long do running TLS connections using MQTT, this works for 5-6 figure of units. And our actual usage when we have good cell coverage is around 25megs/mo, including data. But when you have the qty Google and iOS have....maybe that's prohibitive?