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Spam Blocker app for unwanted phone and sms
(lemmy.ml)
F-Droid is an installable catalogue of FOSS (Free and Open Source Software) applications for the Android platform. The client makes it easy to browse, install, and keep track of updates on your device.
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Yea better off changing phone numbers. Also there is a service that said they wipe your data to stop spam calls and other junk messages but not sure how effective that could be either.