I haven't gone as far as rooting my brand new Samsung S7 due to it voiding the phones warranty and insurance contract but I have deleted both of my google accounts (PC and phone) and disabled everything google related.
I'm also testing out SSE Universal Encryption App & EDS (Encrypted Data Store). Regardless of encryption; everything sensitive stored on a portable means should be kept at a minimum as people have a tendency to get drunk and lose their phones.
Both these apps are available from Google Play...
SSE - Universal Encryption App - Android Apps on Google Play
EDS - Android Apps on Google Play
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