PSA: If you want to play LoL via phone
Say you're in a situation where your Wi-Fi/Cable connection is bronze tier and you are unable to have it fixed immediately, hotspot from your phone is a decent alternative. It takes about 30mbs per 30 minute game assuming you don't stream anything in the background. Every 1 GB of data, you get about 16.6 hours worth of gameplay. If you have 3GB of data extra per month, that will net you ~50 hours of gameplay.