M3 Note- How to upgrade from 5.1.3.2O

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2016-11-10 05:11

Edited by User5200739220 at 2016-11-10 02:56

I purchased my M3 Note from a local reseller in Eastern Europe. The "Update" app says that I am on version 5.1.3.2O and there are no updates available even though it's like 6 months old version. Google Play etc. were installed by default and it was multilanguage ROM. I believe it was distributed to the store by TCCM but I am not sure. Which firmware should I use to upgrade my phone and does it void my warranty if I update manually (not through OTA updates)? Model: M681H LTE  
Thank You!