@GSM_MARSHALS
Locosto Phones can have various problems depend situation !
Please try check the next :
http://forum.gsmhosting.com/vbb/showthread.php?t=518643
& make test with "COM PORT" Comunication to be sure !
in some cases too , some bad battery contcat or low power can be a reason for that , try use direct power to battery connector
from SMTi external power with a connected charger to box !