Verizon in particular in the US is seen as being between a rock and hard place over unlimited data plans – unable to keep speeds on the upward spiral when it offers unlimited data plans – but unable to sign new customers when it doesn’t. In Q1 this year Verizon lost 307,000 mobile customers, until it embraced the unlimited plans which were allowing Sprint to make a comeback, and which allowed T-Mobile to be the cellular net adds leader for 12 straight quarters. Then its customer numbers turned upwards again as Verizon added 614,000 phone customer in Q2, but already it is uncomfortable with the strategy and is looking to adjust it. Over the past quarter phone commentators have been…