2 days on the DNA coming from 2 years on the Thunderbolt. The bolt held a solid 4g signal every day of the 2 years and I'm in the middle of nowhere in a corn field. DNA only holds a 4g signal after it has sat still for a few minutes. Move it and it's back to 3g. So you might test orientation of the phone and once you get 4g, don't move. Compare the bolt 4g antenna to the Rezound, no contest, the Rezound's antenna is huge. If I put the DNA in my window I gain 2mb/s download speed. Best I've seen is 6 down, 3 up, same as the bolt but not as stable.