Yes. Once you hit "gold rewards" status, any additional topup, regardless of denomination $10, $20, etc., extends the expiration for another year. I have been keeping my very low usage tmobile payg, that I have as a backup, going like this for at least 6 years.
Originally Posted by
Dubai Stu
My understanding is that once you hit gold status with TMobile ($100), every $10 recharge pushes your renewal back 1 year.