As the global 3G sunset accelerates and 4G spectrum is progressively refarmed for 5G New Radio (NR), regional telecom operators face complex decisions about CPE fleet compatibility, investment timing, and subscriber migration strategy. With over 90 operators worldwide having announced 3G shutdowns and many now planning 4G spectrum refarming in low and mid-bands, understanding the CPE implications is critical for network planners and procurement teams.
The Spectrum Refarming Landscape in 2026
Spectrum refarming — the reallocation of frequency bands from legacy technologies to newer ones — is accelerating across three dimensions in 2026:
- 3G Sunset Completion: With 2100 MHz (Band 1) and 900 MHz (Band 8) now fully refarmed to 4G LTE or 5G NR in most of Europe, Asia-Pacific, and North America, operators are redirecting these bands for 5G low-band coverage layers. CPE that only supports 3G on these bands is no longer deployable.
- 4G LTE Spectrum Reallocation: A growing number of operators are refarming 1800 MHz (Band 3) and 2600 MHz (Band 7) from LTE-only to dynamic spectrum sharing (DSS) between 4G and 5G NR. In markets with mature 5G adoption, entire LTE carriers are being converted to 5G NR-only operation.
- Sub-1 GHz 5G Expansion: The 600 MHz (Band 71) and 700 MHz (Band 28) bands — historically reserved for broadcast or LTE coverage — are increasingly allocated to 5G NR for deep indoor and rural coverage, requiring CPE with extended low-band NR support.
CPE Compatibility Risks During Spectrum Transitions
Operators managing heterogeneous CPE fleets face several compatibility risks during spectrum refarming transitions:
Band Support Gaps
Legacy LTE Cat-4 CPE devices often support a limited band set — typically B1/B3/B7/B8/B20 in EMEA markets. When an operator refarms B3 for 5G NR, these devices lose their primary capacity band and may fall back to congested B20 (800 MHz), resulting in severe throughput degradation. Operators should audit CPE fleet band support against their 3-5 year spectrum roadmap before bulk purchasing decisions.
DSS Interoperability
Dynamic Spectrum Sharing allows 4G and 5G to coexist on the same frequency band, but CPE modem firmware must correctly handle DSS scheduling. Older LTE chipsets — particularly those based on Qualcomm X5/X7 or MediaTek T750 platforms — may exhibit reduced throughput or connection instability in DSS environments. Operators should require DSS interoperability test reports from CPE suppliers for any device intended for DSS-deployed bands.
5G SA vs. NSA Dependency
Non-Standalone (NSA) 5G CPE requires an LTE anchor band for control plane signaling. If an operator refarms the LTE anchor band (typically B3 or B7) to 5G NR-only operation, NSA CPE loses connectivity entirely. The transition path is to 5G Standalone (SA) CPE that operates independently of LTE — but SA-capable chipsets carry a BOM cost premium, and many early 5G CPE deployments were NSA-only. Operators with NSA-dominant fleets must plan SA migration before refarming LTE anchor bands.
Economic Decision Framework for Regional Operators
The decision to proactively replace CPE ahead of spectrum refarming versus waiting for natural device churn involves trade-offs:
- Subscriber Experience Risk: Allowing CPE to degrade to a single low-band carrier after refarming can increase churn. The cost of subscriber acquisition typically exceeds CPE replacement cost by a factor of 3-5x in competitive markets.
- Bulk Procurement Economics: Ordering CPE in volumes of 10,000+ units reduces per-unit cost by 15-25% versus smaller replenishment orders. Operators with upcoming spectrum changes should time bulk purchases to coincide with refarming milestones.
- Trade-In Programs: Several operators in Europe and Southeast Asia have successfully implemented CPE trade-in programs, offering subscribers a discounted 5G CPE upgrade in exchange for returning legacy 4G devices. The returned devices can be refurbished for markets with later refarming timelines or sold into secondary markets.
- Multi-Band Future-Proofing: Selecting CPE with broad band support — covering B1/B3/B5/B7/B8/B20/B28/B38/B40/B41 as a minimum for global deployment — reduces spectrum refarming risk. The incremental BOM cost for additional band support in modern RF front-end modules is modest, typically $1.50-3.00 per device.
Migration Strategy Recommendations
For regional operators planning spectrum refarming within the next 12-24 months, we recommend a phased approach:
Phase 1 — Fleet Audit (Months 1-3): Inventory all deployed CPE by model, chipset generation, and band support. Identify devices that will lose their primary capacity band after planned refarming. Map each device model to a migration action: retain, firmware-upgrade for DSS, or replace.
Phase 2 — New Procurement Specification (Months 3-6): Update CPE procurement specifications to require 5G SA support, broad sub-6 GHz band coverage including all planned NR bands, DSS interoperability certification, and eSIM support for flexible operator profile management during transition periods.
Phase 3 — Subscriber Migration (Months 6-18): Execute targeted CPE replacement for at-risk subscribers, prioritizing those in areas where LTE capacity bands are being refarmed first. Use ACS-based remote management to push configuration updates to DSS-capable devices. Implement trade-in programs to accelerate voluntary upgrades.
Frequently Asked Questions
How do I know if my existing CPE fleet will be affected by spectrum refarming?
Conduct a fleet audit cross-referencing each CPE model’s supported frequency bands against your spectrum refarming roadmap. Devices that rely on bands scheduled for refarming as their primary capacity layer are at risk. Your CPE supplier should provide band support matrices and modem firmware capabilities for each model.
Can firmware updates extend CPE compatibility with refarmed spectrum?
Firmware updates can improve DSS interoperability and enable new band combinations on modems that already have the necessary RF hardware support. However, firmware cannot add frequency band support that the RF front-end hardware does not physically support. Hardware band support is determined by the RF filters, power amplifiers, and antenna matching circuitry designed into the device.
What is the typical lead time for CPE orders during a spectrum transition?
Standard CPE orders typically require 4-8 weeks for production and shipping, but customized SKUs with specific band combinations or firmware requirements may require 10-14 weeks. Operators should plan procurement at least 4-6 months ahead of planned refarming dates to avoid supply chain delays during industry-wide transition periods.
Planning a spectrum refarming transition? Honlly Telecom provides multi-band, future-proofed CPE with broad sub-6 GHz coverage and DSS-validated firmware. Request a consultation with our engineering team →