Regarding "T-Mobile ONE™ Unlimited 55+" plan - one general info page says "Unlimited talk, text, & high-speed data on your phone". A plan comparison page says "0GB 4G LTE smartphone data". Is "high-speed data" only 3G?
That plan offers unlimited 3-g speed internet connectivity which used to be considered high speed. There is no LTE 4G speed tethering on that plan. However there is unlimited data use on that plan.
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