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I called support and was told that I had to manually enter each entry into the built in phone book and that the IS8151 did no use downloaded phone entries to determine if the call should not be blocked.
Sorry, there was a problem. Please try again later.Hi - We are sorry to hear that you are having issues with the VTech IS8151-5. We recommend that you contact our Customer Support at 1-800-595-9511 for troubleshooting and assistance. We are open from 9:00 AM to 4:00 PM, Mondays through Fridays. Thank you, -VTech Support
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