[H60-L04] B507 upgrade??

hi. i unbricked my phone via B550 package, but id did B507 update after factory reset. now i cant install B550 OTA again ("software install failed")
and my question: what can i do to install newer version of Lollipop on my B507 (want expecially stable)?
sorry for bad english. say that you can't undetstand.

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