Upgrading Mate 7 (MT7-L09V100R001C00B142SP05) Possible? South Africa

Any body know if its possible to upgrade my Mate 7 to any thing newer than KITKAT?

Phone info:
South African (MTN)
Model Number: MT7-L09
Build number: MT7-L09V100R001C00B142SP05
Baseband version: 21.223.00.00.031

Any Upgrade available?
And how would I find it?

Thanks in advance

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