So, after going through the whole fiasco where the first DT2 I got was defective because it kept disconnecting from the network randomly, the replacement DT2 sounds like the vibration motor inside is loose. It is distinctly different from the first phone. It makes a buzzing noise as if it were laying on a hard surface, even when it's not. Does anyone else have this issue with their DT2? It seems Motorola/Lenovo have some serious QC problems.