@nitpicking @briankrebs TTL doesn't really matter on a technical basis except that it's a very easy to detect attribute of data packets, one that the equipment is already looking at because it has to adjust it down by one before sending the packet along.
On the other hand if you're tethering via USB to a phone speed issues might be due to most phone USB ports only doing USB2 speeds.
@fencepost @nitpicking Yes, it apparently matters to some carriers, which seem to use the TTL as a lazy, easy way to restrict the use of their network to devices they (mostly) control.