2G/3G Sunset: Your Complete Migration Guide for 2025

If your IoT devices still rely on 2G or 3G connectivity, time is running out. Carriers worldwide are shutting down legacy networks to free up spectrum for 4G and 5G. Here’s what you need to know and how to plan your migration.

Network Shutdown Timeline

North America

United States:

• AT&T: 3G shut down February 2022 (complete)
• T-Mobile: 2G shut down April 2023, 3G December 2024
• Verizon: 3G shut down December 2022 (complete)

Canada:

• Rogers: 3G shutdown planned for 2025
• Bell/Telus: 3G sunset in progress through 2025

Mexico:

• Telcel: 2G/3G sunset planned for 2025-2026
• AT&T Mexico: Following US timeline

Central America

Most carriers planning 2G/3G sunset between 2025-2027, with significant regional variation.

South America

Brazil:

• Major carriers shutting down 3G through 2025-2026
• 2G sunset planned for 2026-2027

Other Markets:

• Argentina, Chile, Colombia: 3G sunset 2025-2027
• 2G may persist longer in some markets

Impact on Your Deployment

Immediate Risks

If you’re still on 2G/3G:

• Service disruption: Devices will stop working when networks shut down
• No advance warning: Some carriers provide minimal notice
• Regional variation: Shutdown dates vary by market
• Roaming issues: International devices may lose connectivity

Hidden Costs of Delay

Waiting to migrate costs more:

• Rush fees: Emergency hardware replacements are expensive
• Limited options: Best migration solutions book up early
• Operational disruption: Rushed migrations cause more downtime
• Lost leverage: Late movers have less negotiating power

Migration Options

Option 1: Hardware Replacement

When to Choose:

• Devices are 5+ years old
• No firmware upgrade path to 4G/5G
• Hardware is approaching end-of-life anyway

Considerations:

• Upfront capital expense
• Installation/replacement labor
• Opportunity to upgrade other components
• Potential for improved functionality

Cost Range: $50-$200 per device depending on complexity

Option 2: Module Upgrade

When to Choose:

• Device design allows module swapping
• Hardware is otherwise functional
• Large deployment where full replacement is cost-prohibitive

Considerations:

• Requires field service or depot repair
• May need firmware updates
• Certification requirements
• Supply chain for replacement modules

Cost Range: $20-$75 per device plus labor

Option 3: Firmware Upgrade

When to Choose:

• Devices have multi-mode modems (2G/3G/4G)
• Firmware can enable 4G bands
• Devices are accessible for OTA updates

Considerations:

• Verify hardware actually supports 4G
• Test thoroughly before mass deployment
• May need carrier recertification
• Potential for bricking devices

Cost Range: $5-$15 per device (mostly labor/testing)

Option 4: Hybrid Approach

Most deployments benefit from a mixed strategy:

• Critical devices: Replace first for reliability
• Accessible devices: Upgrade modules or firmware
• End-of-life devices: Replace on normal schedule
• Low-value devices: Decommission if ROI doesn’t justify upgrade

Migration Planning Framework

Phase 1: Assessment (Month 1)

Inventory Your Devices:

Device Type | Count | Current Tech | Location | Criticality
-----------|-------|--------------|----------|------------
Sensor A   | 5,000 | 2G          | US       | High
Tracker B  | 2,000 | 3G          | Mexico   | Medium
Gateway C  | 500   | 3G          | Brazil   | Critical

Determine Shutdown Dates:

• Check carrier announcements
• Verify dates for each market
• Add 6-month buffer for planning

Evaluate Options:

• Can devices be upgraded?
• What’s the cost per option?
• What’s the operational impact?

Phase 2: Strategy Development (Month 2)

Define Migration Approach:

• Which devices get which treatment?
• What’s the timeline?
• Who does the work?
• What’s the budget?

Select Technology:

• 4G LTE Cat-M1 for low-power IoT
• 4G LTE Cat-1 for higher bandwidth
• NB-IoT for ultra-low-power sensors
• 5G for high-bandwidth applications

Choose Vendors:

• Hardware suppliers
• Installation partners
• Connectivity providers
• Integration support

Phase 3: Pilot Program (Months 3-4)

Test at Small Scale:

• Migrate 1-5% of devices
• Validate technical approach
• Measure costs and timeline
• Identify issues

Validate:

• Connectivity quality
• Data transmission
• Power consumption
• Application compatibility

Refine:

• Adjust procedures
• Update documentation
• Train field teams
• Optimize costs

Phase 4: Mass Migration (Months 5-12)

Prioritize by Risk:

1. Devices in markets with earliest shutdowns
2. Critical business functions
3. Difficult-to-access locations
4. Remaining devices

Execute in Waves:

• 10-20% per month
• Monitor for issues
• Adjust as needed
• Maintain support for legacy devices

Track Progress:

• Devices migrated vs. plan
• Issues encountered
• Costs vs. budget
• Timeline adherence

Phase 5: Validation (Month 13)

Verify Complete Migration:

• All devices on 4G/5G
• Legacy SIMs deactivated
• Cost savings realized
• Performance improved

Cost Optimization Strategies

1. Negotiate Volume Discounts

Leverage your migration as a negotiation opportunity:

• Bundle hardware, connectivity, and services
• Commit to multi-year contracts for better rates
• Use competitive bids to drive pricing
• Negotiate migration support from vendors

2. Optimize Technology Selection

Don’t over-spec:

• Cat-M1 for most IoT sensors (lower cost than Cat-1)
• NB-IoT for ultra-low-power applications
• Cat-1 only when bandwidth justifies it
• 5G only for specific high-bandwidth needs

3. Combine with Other Upgrades

If you’re touching devices anyway:

• Upgrade sensors or firmware
• Improve power systems
• Add new capabilities
• Extend device lifespan

4. Leverage Carrier Incentives

Some carriers offer:

• Subsidized hardware
• Free migration support
• Waived activation fees
• Promotional pricing

Common Migration Mistakes

1. Starting Too Late

Problem: Rushed migrations cost 30-50% more and cause more disruption.

Solution: Start planning 12-18 months before shutdown dates.

2. Assuming Devices Are Upgradeable

Problem: Many “4G-ready” devices can’t actually be upgraded.

Solution: Verify upgrade path with manufacturer before planning.

3. Ignoring Certification Requirements

Problem: New modules may require carrier recertification.

Solution: Factor certification time and cost into planning.

4. Underestimating Field Labor

Problem: Installation costs often exceed hardware costs.

Solution: Get accurate field service quotes early.

5. Not Testing Thoroughly

Problem: Issues discovered during mass migration are expensive to fix.

Solution: Run comprehensive pilot program first.

Regional Considerations

United States & Canada

• Most aggressive shutdown timelines
• Best availability of 4G/5G options
• Mature ecosystem of migration partners
• Highest labor costs

Mexico & Central America

• More flexible timelines
• Growing 4G coverage
• Cost-effective labor
• Supply chain considerations

South America

• Varied shutdown timelines by country
• 4G coverage expanding rapidly
• Local partnerships important
• Regulatory complexity

Need Migration Help?

We’ve helped companies migrate over 2 million devices from 2G/3G to 4G/5G. Our migration service includes:

• Technology assessment and strategy
• Vendor selection and negotiation
• Pilot program management
• Mass migration execution
• Post-migration optimization

Schedule a Migration Planning Session

Free Resources:

• 2G/3G Sunset Timeline by Carrier (Download)
• Migration Cost Calculator (Download)
• Technology Selection Guide (Download)
• RFP Template for Migration Partners (Download)