Is T-Mobile bringing change in mobile industry with SIM-free service?

This is the biggest question sensitive consumers asking or trying to find out after T-Mobile's announcement of offering Apple's iPhone 5 SIM-free, which is under contract free service. What you suggest?

Let us find out.

Few analysts suggest even if the new no-contracts and no-subsidy plans from T-Mobile seems to bring change in the mobile industry but it won't be fast. The reason behind the slow pace is the technical challenges to make the handset true interoperability.