Different band scanning approaches

[void-elf]

We've had a variety of different ideas for doing wider scans:

1. Separate processes to scan all the LTE bands in the background, and update the EARFCN list with anything it finds. (This should take 5-10 minutes.) Alternatively we could do this at the very beginning before we start the scan.
2. Also sometimes scanning outside of the North American specific LTE bands might be a good idea, esp since e.g. outside of consulates or in an international area, phones from there will still be receptive to using non-NA LTE bands.

[void-elf]

Also apparently srsLTE comes with a script where you can give it a band number and it'll scan the whole thing?