[aaron695]

Wi-Fi.

It works ok on most devices.

If Bluetooth being crap was about cheapest solutions, I'd expect to see this problem on Wi-fi, which in practice generally works.

[dingaling]

WiFi isn't much better in my experience. When I take my phone out of Flight Mode, the 4G LTE data connection is established in a fraction of a second whereas the WiFi can take 10 seconds or more. To a known router that is five metrea away.