2016 Christmas present and 4 Stars thus far because AT&T SIM works fine but sprint SIM card isn't working

Dual SIM was easy to set up& I could get down to one phone but kept my work and personal cell numbers.

Doesn't work with AT&T sim as told.

After ensuring that T-Mobile would support this phone, I found that it was not difficult to use an International version dual sim phone in the US and as an added bonus, I was also able to use the second sim slot to place my sd card in, which now holds all 14GB of my music and pics, thus freeing up more storage on the phone itself

the second sim works in 2g only

its a good phone but sim 2 seems to trip offline on a regular basis forcing me to disable/enable it to bring it back.

Good evening I just ordered this phone a month ago