With this Saturday approaching fast T-Mobile’s Father’s Day 2011 sale is ready to kickstart the weekend. However, as our ninja screenshot shows you existing customers should take note of the necessary qualifiers. Existing customers should be aware that in order to take advantage of this deal your contract will have to end on or before 12/18/2011 and that date may be different from your upgrade eligibility.

It’s unfortunate but for those of you who have changed to a new rate plan lately or accepted another promotional offer may want to check with T-mobile about qualifying for this Father’s Day special offer. I can’t imagine T-Mobile reviewing every account in order to ensure that there was less than 6 months on the contract but we thought you should know ahead of time, just in case.