Operate Electron on local SIM cards

[aforbis-stokes]

Patricle's SIM charges $$rates compared to local. Also, local SIMs in India have much better, reliable connection to cell network.

[suyashkumar]

Seems like it's supported, but will take a little work. We should do it (particularly if we can get data-only SIM cards).
https://docs.particle.io/faq/particle-devices/electron-3rdparty-sims/electron/