Update Mobile Number

🎯 Purpose

Enables users to change the mobile phone number used for receiving SMS authentication codes. This functionality ensures continuous access to SMS-based authentication when users change phone numbers or carriers.

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📍 Access Requirements

• Edit Mode Active: Re-authentication must be completed
• SMS Factor Present: User must have SMS OTP authentication configured
• Update Button Available: SMS factor must show update capability in "Others" section

🔄 Mobile Number Update Process

🎯 Initiation

• Location: SMS authenticator in "Others" section with Auth Type: SMS
• Action Button: Click update/edit button (📝) for SMS authentication
• Availability: Button only functional after re-authentication
• User Context: Clear indication this affects SMS OTP delivery

🖥️ Update Mobile Number Screen

• Screen Title: "Update Mobile Number" prominently displayed
• Current Number: May show masked current mobile number
• New Number Field: Input field for new mobile phone number
• Format Guidance: Instructions for proper number format
• Generate OTP Button: Trigger for sending verification SMS

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📊 Mobile Number Update Interface Elements

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🔐 Mobile Number Verification Process

📱 OTP Generation and SMS Delivery

1. Number Entry: User enters new mobile phone number
2. Format Validation: System validates number format and carrier compatibility
3. Generate OTP: User clicks "Generate OTP" button
4. Code Creation: System generates 6-digit verification code
5. SMS Dispatch: Authentication code sent via SMS to new number
6. User Notification: Confirmation that SMS has been sent

📲 SMS Characteristics

• Sender: REL-ID system SMS service
• Content: 6-digit verification code with clear identification
• Delivery: Usually delivered within seconds to minutes
• Expiration: Code valid for limited time (typically 5-10 minutes)
• Format: Clear, easy-to-read numeric code

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🔄 Mobile Number Validation Flow

📝 Code Entry and Validation

1. SMS Reception: User receives text message with 6-digit code
2. Code Retrieval: User reads authentication code from SMS
3. Code Entry: User enters code in "Validate Authentication Code (sent via SMS)" screen
4. System Validation: Code verified against generated value
5. Time Check: Validation ensures code used within expiration window
6. Success Processing: Valid code triggers mobile number update

🎯 Validation Screen Elements

• Screen Title: "Validate Authentication Code (sent via SMS)"
• Instruction Text: Clear guidance about SMS code location
• Code Input Field: 6-digit numeric input field
• Resend Option: Link to request new SMS if needed
• Validate Button: Processes the entered code

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✅ Success Flow

🎉 Successful Mobile Number Update

1. Code Validation: Entered code matches and is within time limit
2. Number Update: New mobile number replaces old number in system
3. Success Screen: "Update Mobile Number - success screen" displayed
4. Confirmation: Clear message that mobile number has been changed
5. Immediate Effect: New number active for future SMS OTP delivery

📱 Success Screen Features

• Success Icon: Visual confirmation of successful change
• Success Message: "Your mobile number has been successfully updated"
• New Number Display: Confirmation of updated mobile number (may be masked)
• Return Option: Link back to Sign In Options screen

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🔄 Mobile Number Update Flow Diagram

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🚨 Error Handling and Recovery

❌ Common Error Scenarios

🔄 Recovery Options

• Resend SMS: New verification code sent to same number
• Number Correction: User can modify number and retry
• Format Help: Guidance on proper number formatting
• Carrier Support: Information about SMS delivery issues

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📱 Mobile Number Format Requirements

🌍 International Support

• Country Codes: Support for international number formats
• Carrier Compatibility: Works with major mobile carriers
• Format Validation: Real-time validation of number format
• Regional Support: Adaptation to local numbering conventions

📊 Format Guidelines

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🎯 User Experience Considerations

📲 SMS Delivery Guidance

• Delivery Time: Expected SMS arrival time (usually under 1 minute)
• Signal Strength: Importance of good cellular reception
• Carrier Delays: Possible delays during high-traffic periods
• International: Additional considerations for international numbers

🔒 Security Features

• Number Verification: Ensures user controls the new mobile number
• Time-Limited Codes: Prevents code reuse and reduces security risk
• Single-Use Codes: Each code can only be used once successfully
• Carrier Security: Leverages carrier-level SMS security

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⚠️ Important Considerations

🔄 Immediate Effect

• Instant Activation: New mobile number immediately active
• SMS Delivery: Future authentication codes sent to new number
• Old Number: Previous number no longer receives authentication SMS
• No Delay: Change takes effect immediately upon validation

🛡️ Security Implications

• Access Control: User must control both current session and new mobile device
• Verification Required: Prevents unauthorized number changes
• Audit Trail: Mobile number changes logged for security monitoring
• Recovery Impact: Changes may affect account recovery processes
• Cross-Platform: Number change affects all systems using SMS authentication

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