it replies"modem successfully unlocked'' but when i removed the etisalat sim and insert the original airtel sim,it still give error message that''please insert the correct (u)sim''.i have also tried generating flash code but no slot to input it.Thanks as you reply.obasimiracle said:check if the post heredrtob said:@ obasimiracle and others,please i need help unlocking my ZTE MF190 airtel nigeria modem.i have tried dc-unlocker but i it didn't work.IMEI is 861648008613089.thanks as you render useful information.helps, what is the message from the dc unlocker app by the way?Code:http://www.obasimvilla.com/unlock-blackberry-mtn-airtel-etisalat-easyblaze-zte-mf631-mf180-free-e303-guide/