First phone came Thursday, spent hours with T-Mobile support trying to get 4G. It came and went minutes at a time. MSFT sent a second, same issue. I have full 4G on my 521, swapped SIM, it's the phone. I have a number for Nokia to call tomorrow. But will return the phone, replace with 625. I agree with the washed out colors. Thought it would be similar spec'd as 521.