Phone Category
LeadConnector Phone
- Why are my Calls marked as Spam and how can I avoid it
- Phone Number Settings Explained
- How to Purchase a Phone Number for Your Business
- Forbidden message categories for SMS and MMS in the US and Canada
- A2P 10DLC Campaign Approval Best Practices
- LeadConnector Messaging Policy
- Brand Registration Step by Step Guide and FAQs
- Toll-Free Verification Guide for LC - Phone (US/Canada)
- How to buy a toll free number?
- Detailed Pricing for A2P 10DLC Registrations
- What is A2P 10DLC?
- A2P 10DLC Brand Approval Best Practices
- U.S. A2P 10DLC Messaging Registration Mandatory, Effective from July 5, 2023
- Why Was My Toll-Free Verification Rejected?
- Know Your Customer (KYC) in the United Kingdom
- Reduce Spam Calls with Number Intelligence and DND
- Remediate 'Spam Likely' on your Caller ID using Voice Integrity
- Microphone permission on different browsers
- Best Practices for SMS deliverability and Avoiding SMS Restrictions
- Message throughput (MPS) and Trust Scores for A2P 10DLC in the US
- List of campaign use case types for A2P 10DLC registration
- A2P Opt-In Form - Privacy Policy and Terms and Conditions Guidelines
- How to submit a Campaign for A2P 10DLC ?
- Configuring Sender ID and Opt-Out Language for SMS Compliance
- Campaign Rejection Reasons and Resolutions
- Calculating SMS and MMS Costs: A Step-by-Step Guide
- How to Set Up Verified Caller ID (Use your number for Voice Calls)
- How to Set Up Call Tracking (Number Pool)
- Call Forwarding to Your LeadConnector Phone Number
- Track Call Outcomes with Custom Call Dispositions
- VoIP Deskphones (SIP endpoints)
- Regulatory Bundle and Address Creation for Sub-Accounts
- Identity Verification for Phone Number Purchases (US/CA/PR/IL)
- Best Practices Around Periodically Sending Opt-Out Texts and Sender IDs
- Why doesn’t my Business Name display after CNAM registration?
- Quiet Hours
- Texas Mini-TCPA Law: What You Need to Know (Effective Sept. 1, 2025)
- Call Recording Storage
- Call Transcriptions for Recorded Calls
- Phone Number Edit Configuration (Incoming Calls Settings)
- Improve your Phone Number's reputation with Voice Integrity
- Recommendations and Best Practices for Maintaining a Positive Caller Reputation
- Why are my Calls marked as Spam, and How can I avoid it ?
- What is A2P 10 DLC- Brand and Campaign Registration?
- What is SHAKEN/STIR?
- What is CNAM?
- Agency SMS Warm-Up Period & Daily Limit
- Voicemail Article
- KYC Verification on Persona — Best Practices
- Billing Statement Help
- Updated Messaging Guidelines for the U.S. & Canada
- Opt-In Methods & Their Compliance Requirements
- Website Compliance Guide
- How to get your phone number A2P approved in 2026
- Avoiding Call Loops when routing calls to Internal Phone Numbers
Error Code and Warning Dictionary
- 21211: Invalid 'To' Phone Number
- 21408: Your account is not allowed to send SMS to this country or region.
- 21614: 'To' number is not a valid mobile number
- 21635: The "To" number is a landline and cannot receive SMS.
- Fix "From Number Not SMS Capable" Error
- 30002: Message failed: your account is currently suspended
- 30003: Number unreachable or out of service.
- 30004: Recipient has opted out or has DND enabled.
- 30005: The recipient’s number is inactive or does not exist
- 30006: Landline or unreachable carrier
- 30007: Message filtered
- 30008: Unknown error
- 30011: MMS not supported by the receiving phone number in this region
- 30023: Daily Message Cap Reached
- 30032: Toll-Free Number Has Not Been Verified
- 21610: Attempt to send to unsubscribed recipient
- 30033: US A2P 10DLC - Campaign Suspended
- 30037: Outbound Messaging Disabled
- 21612: Message cannot be sent with the current combination of "To" and/or "From" parameters
- Error 30034: Linking a Phone Number to Approved A2P Campaign
- 21606: The 'From' phone number provided is not a valid message-capable phone number for this destination/account
- 30035: Number not fully registered for A2P messaging. Please wait up to 24 hours after approval.
- How to Prevent SMS Filtering by Carriers: Error 30007
- How to Fix Error 21612: Messaging Route Not Supported
- 20003 - Credentials are invalid or the account has been suspended
- Custom Module Visibility by Role & Location
- 30453: Blocked by the recipient's carrier as a fraud precaution
- Error 30024: Numeric sender ID not provisioned on carrier
A2P / SMS Compliance
LeadConnector Phone
- SMS Compliance Guide: Consent, Opt-Outs, and Sending Limits
- Voicemail article coming soon
- Inbound Calls: IVR, AI, Routing & Call Flow Explained
- How to Reduce Inbound Spam Calls
- Choosing between using your existing phone number vs buying a new phone number
- AI-Powered A2P Compliance Validation
- Voice calling with ResQEngage
- Use Your Existing Phone Number to Place Voice Calls
- Porting Options: US In-App vs International Manual Process
- How to create and link a Regulatory Bundle for Australian local numbers
- Ring inbound calls during working hours
- How to Submit and Track Port-In Number Requests
- Inbound Call Routing by Working Hours
- Brand Approval Best Practices for A2P 10DLC
- How to Assign LC Phone Numbers to Users
- How to buy a toll free number
- Configure SMS Compliance Settings
- How To Forward Inbound Calls to Mobile App
- Using Call Connect to Ensure Accurate Call Status Tracking
- Overview of Phone Number Configuration Options
- A2P Campaign Registration: Step by Step Guide and FAQs
- Fix Call Disconnections in LeadConnector Mobile App
- How to Fix Bad Call Quality in ResQEngage
- Ring Incoming Calls to Multiple Users
- Phone Dialer Overview
- Troubleshooting SMS Delivery Issues
- How to Purchase a Phone Number
- Attachment Size Limits for LC Phone SMS/MMS & Email
- How to Send Inbound SMS Notifications via a Workflow
- International SMS Compliance: UK & Turkey Regulations
- LC - Phone Messaging Policy
- Moving Phone Numbers Across Accounts (US and International)
- Moving Numbers Between Sub-Accounts (Same Parent Account)
- Moving Phone Numbers: Migration & Porting Guide
- Number Hosting Guidelines for Hosted Messaging
- Outbound Calls with the Web Dialer (Softphone)
- Phone System Messaging Analytics Overview
- Physical VoIP Deskphones (SIP)
- Setting up webhooks to receive incoming calls, messages and status updates for calls (for Twilio users)
- Toll-Free Number Verification Guide for LC - Phone (US/Canada)
- Understanding Common SMS Delivery Errors
- Understanding LC Inbound Call Rate Limits
- Workflow Trigger - Call Details
- Transfer Calls to Staff Without a Personal Phone Number
- Why SMS in Mexico May Appear from a Different Number
- A2P Campaign Rejections, Required Fixes & Vetting Errors
- How to Create and Use Call Scripts in Web & App Dialers
- Why are my Calls marked as Spam and how can I avoid it
- Why are my Calls marked as Spam, and How can I avoid it ?
- How to buy a toll free number
- Phone Number Change Security Alerts and Reversal
- Use Your Existing Verified Number for Calls in the Mobile App
- Set Up Voicemail and Voicemail Drops
- RCS in ResQEngage
- How RCS Registration works
- What Reviewers Check During RCS Sender Registration
- RCS Billing
- Multi line dialer
- New A2P Status Tags on Phone Numbers