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Unauthorized Change of Telephone Service Carrier (Slamming) About Slamming Preventing Slamming of Your Account Email Scam (Phishing) About Phishing Authorizing a Carrier Freeze and Troubleshooting a Slammed Account Carrier Freeze Authorizing a Carrier Freeze Accounts on Which You Can Apply a Carrier Freeze Effective Date of a Carrier Freeze Removing a Carrier Freeze Removing Another Carrier's Charges Unauthorized Charges on Your Telephone Bill (Cramming) Cramming Stopping Unauthorized Charges Unsolicited Mail and Calls Preventing Unsolicited Mail and Telemarketing Calls From Verizon Blocking Unsolicited Telemarketing Calls National Do Not Call List Modem Security Modem Hijacking