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3 ipei and ipdi codes, Dial *#06# when the phone is in idle mode, Press back to return to idle mode – AASTRA DT390 for BusinessPhone User Guide EN User Manual

Page 4: 4 software version, Dial *#34# when the phone is in idle mode, Select software and press select, Press back until you return to idle mode

3 ipei and ipdi codes, Dial *#06# when the phone is in idle mode, Press back to return to idle mode | 4 software version, Dial *#34# when the phone is in idle mode, Select software and press select, Press back until you return to idle mode | AASTRA DT390 for BusinessPhone User Guide EN User Manual | Page 4 / 106 3 ipei and ipdi codes, Dial *#06# when the phone is in idle mode, Press back to return to idle mode | 4 software version, Dial *#34# when the phone is in idle mode, Select software and press select, Press back until you return to idle mode | AASTRA DT390 for BusinessPhone User Guide EN User Manual | Page 4 / 106