Infinix Mobility recently released Android 7.0 Nougat for Infinix Note 3 and Note 3 Pro. They happened to be the first Infinix phones to receive Android 7.0, even ahead of their latest and newly launched smartphone - Infinix S2 Pro.

The update is available over the air, but if for some reasons you can't upgrade via OTA, you can do that manually via Tcard.

Here are the download links for the Tcard version for the different versions of the Note 3:

H536A1_Tcard_update_170324V139 http://url.cn/47RfmVe

H537A1_Tcard_update_170327V87     http://url.cn/47Rfnbv

H537B1_Tcard_update_170327V63     http://url.cn/47RforV

H537C1_Tcard_update_170327V36     http://url.cn/47Rk35I

And here is the Android 7.0 Nougat Schedule for some other Infinix devices:

Zero 4   From M to N :  End of April 

Zero 4 Plus   

Beta 1:  25th Of May 

Beta 2: 15th  Of June 

GM : 15th Of July 

Hot S

Beta 1:  25th Of May

Beta 2: 8th Of June

GM : 31st of June 

Hot4 3G(16+2)

Beta 1:  30th Of April (0414 GMS certificaion , maybe delay for one week )

Beta 2: 20th Of May

GM : 5th of June 

Hot4 Pro 4G(16+2)

Beta 1: 30th Of May

Beta 2:  20th Of June 

GM : 20th of July