Found this over at xda and thought I'd share. It worked on the OG EVO and worked on my 3vo
[GUIDE - YMMV] Connect to 4G sooner & stay on longer - xda-developers
[Guide]Confirmed fix/workaround for 4G reconnection issues - xda-developers
You need your msl so call sprint or do the workshop method
[GUIDE - YMMV] Connect to 4G sooner & stay on longer - xda-developers
[Guide]Confirmed fix/workaround for 4G reconnection issues - xda-developers
You need your msl so call sprint or do the workshop method