• Responses are due within 30 days of service 
• Objections must be raised within 15 days 
• Extensions may be negotiated between parties 
• Court intervention may modify these timeframes 

Key information to request includes: 

• Call detail records (incoming and outgoing)
• Text message logs
• Location data and cell tower information
• Subscriber information and account details
• Device identification numbers (IMEI, ESN)
• Account billing records
• Service plan details and changes
• Connected device history
• Call forwarding settings and history
• Voicemail access logs 

Effective structuring includes: 

• Chronological organization by date ranges
• Separate questions for different types of communications
• Specific identification of phone numbers involved
• Clear distinction between business and personal usage
• Detailed queries about retention and deletion practices
• Questions about authorized users and account access
• Specific inquiries about backup and storage methods 

Important authentication questions include: 

• Identity of the custodian of records
• Verification of record-keeping practices
• Confirmation of business record status
• Documentation of chain of custody
• Identification of any gaps in records
• Verification of time zone information
• Confirmation of accuracy and completeness
• Details about any system changes or updates 

Critical technical questions cover: 

• Data retention policies and periods
• Format of stored records
• Systems used to maintain records
• Backup and archival procedures
• Methods for accessing historical data
• Technical limitations of record-keeping
• Data export and formatting capabilities
• Third-party service provider involvement 

Questions regarding preservation should cover: 

• Date preservation began
• Steps taken to preserve data
• Scope of preservation efforts
• Identification of preserved sources
• Documentation of preservation methods
• Verification of compliance
• Handling of auto-deletion features
• Preservation confirmation procedures 

Important carrier-specific questions include: 

• Carrier policies on record retention
• Available data formats and fields
• Third-party data processing vendors
• Cell tower location data availability
• Cross-carrier communication records
• International communication handling
• Carrier-specific technical limitations
• Data standardization practices 

Questions about gaps should address: 

• Reasons for missing data
• Deletion circumstances and timing
• Recovery attempts made
• Backup availability
• Alternative sources of information
• Documentation of missing periods
• Explanation of deletion policies
• Verification of completeness 

For business phones, address: 

• Corporate retention policies
• BYOD (Bring Your Own Device) practices
• Business vs. personal usage policies
• Mobile device management systems
• Company backup procedures
• Employee usage agreements
• IT department involvement
• Corporate compliance requirements 

Metadata questions should cover: 

• Types of metadata available
• Storage and retention practices
• Accuracy and reliability
• Collection methods
• Changes or alterations
• Extraction procedures
• Format and accessibility
• Authentication methods 

Questions about billing should address: 

• Billing cycle details
• Payment history documentation
• Service plan changes
• Additional service features
• Usage overages
• Account modifications
• Billing statement retention
• Payment method verification 

For multiple devices, consider: 

• Device switching patterns
• Number porting history
• Concurrent device usage
• Cross-device synchronization
• Account linking information
• Device replacement records
• Multiple line management
• Family plan considerations 

Privacy-related questions should cover: 

• Consent for record access
• Privacy policy compliance
• Third-party access records
• Data sharing practices
• Personal information handling
• Privacy setting changes
• Notification procedures
• Regulatory compliance measures