i have a modem huawei model B315s-936, i got it when i applied for a postpaid plan on globe tattoo.. ask ko lang po baka may nakakaalam dito, nagdecide kami na ipacutoff nalang yung plan, pwede po ba palitan ng prepaid sim yung postpaid sim nakainsert sa modem? gusto sana namin itry na magload nalang sa prepaid sim ng gosurf 15 pesos for 2days.