The Carrier name i.e. Mobilink has been relaced with code 410-01 once i upgraded my iphone 6plus to iOS9.
Performed all trouble shooting SOPs and of no use... reset all network settings too
Apple is busy handling the massive traffic globally for new OS release and devices... i think we will have to wait for another update to get it fixed. Its nothing but the carreer code and ideally the career brand name should appear.
Please assist any one...
Regards