wait for the right time..
minsan delay lang yan.. gaya nung isang sim ko.. I will be block 15 minutes before.. (kadalasan kasi na block yung sim based on observation is 10:45, 3:48, 7:50.. those kind of range..) within that 15 minutes di maka send ng roam on/off
when the clock strikes to the new hour, dun na maka send na ako..