Kickback on T-M One Plan With 7 Paid Lines


    I have a T-Mobile ONE plan with seven lines (all paid for; none are free). Two of the lines are used by my aged in-laws. One of those will always be 0 gb data used (because he only has a flip phone) and the other will be <2 gb at least half the time (she has a smartphone, but doesn't use it much).


    Is there any downside to putting both of their lines as Kickback-eligible?


    Will I get $10.00 back every month (because the flip phone uses 0 data) and $20.00 back the months that the other is <2 gb? Or do both lines have to be under 2 gb to get the kickback? Is it all or nothing?

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