Been seeing many people seeking for privacy oriented OS for phones. For me there are 3 main options in the market #grepheneos, #calyxos and #lineageos. You should also be concerned with your desktop and router os, too... I won't write all here, but rather recommend you seek guidance in these sources:

anonymousplanet.org

thenewoil.org

privacyguides.org

Be careful not to freak out and determine your threat model right. Most of us just want to escape web tracking and minimal privacy/anonymity.

#usethetools

#grownostr