In March 11, 2009 I went to one of their store located in 14th St NW Washington DC looking to get two Sim Cards with T-Mobile Flexpay service to use with my phones, once there and after some insistence from the salesman I was sold "Two free mobile phones with T-Mobile Flexpay without contract", but later the same day I had to return both phones directly in the store because I found that indeed they had a 2 years contract each one even if the seller was trying to tell me that because the phones were Flexpaid that meant there was no contract.
Three months later (June 2009) I received an ETF billing notification from T-Mobile for 400$. I called and explained what originally happened and went to the store to get help solving this problem and finally T-Mobile acknowledged that this phones were indeed returned in less than one day and that the service was never used so it was a mistake and retired the charges.
The big problem came last week when I received a billing notification from SimplyWireless ETF Department charging me 400$ for "breach of contract". One more time I went to the store angry but confident that it would be corrected because it was the same situation, but I was wrong now there was a new salesman in the store that wasn't very helpful, he insisted that he was unable even to call or try to solve or explain the problem to their ETF Department (it looks to me that he already knew about this practice), my only option was to write or call directly, so I did, but no matter what their only response was that I committed a "Breach of contract" because the system says the service was active 82 days and it's my fault that the service wasn't deactivated when I returned the phones even if T-Mobile clearly stated that in fact it was a mistake not attributable to me, they don't care about the customer and they only want your money, the saddest thing is that T-Mobile won't help because they say this is a different company. The last thing a representative of this shady company sent me was a link to "the complete terms and agreement" in their webpage that has many things written that aren't specified in the document that it's signed in their stores.
After this experience I wouldn't even come close to T-Mobile or Simply Wireless, although T-Mobile recognized the problem they should be more careful with their business associates and help their customers against this scams.