I bought N920I on ebay, and it is factory unlocked version. When I use the New iphone with att, it is working well, but it seems the signal is not well enough and the GPS (goole map) is not as accurate as Iphone 6 one. So I went to ATT retail store, they told me I should update my IMEI in their system so might solve the signal problem. So I just gave them my NOTE 5 IMEI, but they tried couple times and was unable to update it for me. So I went back home and called ATT customer service , they finally override the system and helped me successfully updated IMEI . I am wondering does it really matter to update IMEI when I switch from IPhone 6 to NOTE 5?
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