T-Mobile says it has had 15 times its usual trade-ins for BlackBerry models over the last two weeks

A tweet from T-Mobile CMO Mike Sievert reveals that the nation's fourth largest carrier has had 15 times the usual number of BlackBerry related trade-ins over the last two weeks. The genesis for all of this started in the middle of last month when T-Mobile sent out promotional emails to its BlackBerry owning customers, trying to get them to switch to the Apple iPhone 5s.



That led to some back and forth between an unhappy BlackBerry CEO John Chen and T-Mobile CEO John Legere. The latter displayed his usual Legarian wit by saying that he couldn't find Chen on Twitter, but would look for him ...