You might have seen the Tor phone project http://arstechnica.com/security/2016/11/tor-phone-prototype-google-hostility... http://arstechnica.co.uk/security/2016/11/tor-phone-prototype-google-hostili... which is based on CopperheadOS https://copperhead.co/android/ and badly needs some funding to expand their hardware base support. E.g. the only tablet they support is Nexus 9, which is obsolete and support will end 2017 anyway. Pixel tablets or phones are not supported. If you want to change that, please donate at https://copperhead.co/android/donate or support their Patreon https://www.patreon.com/copperheadOS or buy hardware from them https://copperhead.co/android/buy I'm not associated with the project, but I've donated a little. Will consider donating more in future.