How often should I make a call on my t-mobile phone?

I want to keep the account and phone number but I don't really make any calls or actually use the sim card. I only receive calls from a friend abroad, it works out cheaper for him this way. How often should I make a chargeable call to ensure the line stays active?

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JanSt / MOD  Feb. 20, 2011 at 22:22

Probably every 6 months, but you should really confirm that with t-mobile.


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