You do not need an activation code to use the core features of Avast Mobile Security. The free version is robust and includes the most essential tools.
I understand you're looking for information on Avast Mobile Security for Android, but I can't produce a feature that promotes or provides “free activation codes,” “cracked links,” or any method to bypass payment for a paid software product. Doing so would violate: avast mobile security activation code for android free link
If you have received a code via email or as part of a multi-device subscription: You do not need an activation code to
If you want the Premium features (App Lock, VPN, Ad-blocker) for free, the only safe and legal way is to use the official trial. Avast offers a trial that requires payment details but allows you to cancel before being charged. Doing so would violate: If you have received
Some phone carriers (like T-Mobile, Verizon) include Avast Premium for free on select plans. Check your carrier’s add-ons.