In spite of all the advancements that go along with mobile use, keeping certain callers at bay is still a challenge. With uBlock, however, you finally have complete control over your call blocking. This simple yet highly effective Android application is the perfect way to deal with persistent telemarketers, phantom or prank callers, or any contacts you simply do not wish to receive calls from on a temporary or permanent basis. uBlock is remarkably easy to use. You can: Block all calls Block calls from blacklisted contacts Allow all calls Hit the 'Blacklist' option, and you can add to or remove numbers from this list. Having a mobile phone should not mean being accessible to anyone at any time. Download uBlock and gain control over your privacy.