vai keu ki achen amake help korar jonno ami symphony D65 model er ekta set use kori aage jokon prothom sim dhukano hoi thokon ami internet use korte partam grameen and airtell dutate use kortam.kintu jokhon sim duita ber kore abar dhukai thokhon ar internet e dhukte partasi na.onek bar setting korsi kono kaj hoi nai bar bar eai message ta show  kore (error in communication) tai amake ektu somadhan dhen ki kore abar ami internet use korbo AIRTELL +GRAMEEN eai dui sim e ek sathe.plz help me