Our confidence level with this story is pretty high considering the sheer number of reports starting to come in regarding the idea that T-Mobile will have unlocked iPhone’s displayed in store running on T-Mobile’s 3G network. We’re pretty short on details but we do know that store managers were asked to activate a new microSIM before the end of August, but not told what device it would used with.

All the intel streaming in seems to point to a “bring your own iPhone” demonstration in store, which lines up perfectly with what T-Mobile’s been saying all along for their refarmed network. We’re also told that these in store displays all align with T-Mobile’s “selling against the iPhone” strategy in the hopes that customers will be enticed by bringing their own device, and pairing it with T-Mobile’s newly launched unlimited data plan.

There’s no telling when exactly these displays will start popping up in stores or how widespread they will be, but given that there’s plenty of iPhone response activity planned for the month of September in T-Mobile-land, I wouldn’t be surprised if they started showing up in the next few weeks.