As it currently stands, the "PLUS" add-on to a T-Mobile ONE plan (the one that comes with all taxes and fees included in your monthly price) will run you just $5, thanks to a promo that has been live since February. That price drop was from the original $15 it...

T-Mobile announced changes to its T-Mobile ONE Plus plan today that makes it a 2-tier option where some may actually save $10 per month, assuming they don't need the ability to hotspot with high speeds. The upgrades to the $70 ONE plan now come as either the...