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Best DMR Scanner (Tier II & III, Color Codes)
The best DMR scanner is the one that decodes DMR without a surprise upgrade fee and trunk-tracks your system’s tier. DMR (Digital Mobile Radio) is the ETSI two-slot TDMA standard behind Motorola Capacity Plus/Connect Plus, Hytera systems, and a large share of business, utility, and some public-safety fleets — so “supports DMR” is a spec worth reading closely.
Key takeaways Best value (DMR included): Whistler TRX-1 (handheld) / TRX-2 (base). Best front end: Uniden SDS100 / SDS200 — but Uniden sometimes charges a paid DMR upgrade. Free route: a $30 RTL-SDR + GopherTrunk decodes DMR Tier II/III with no upgrade fee. Nothing here decodes encryption.
The DMR upgrade-fee trap
This is the single most important buying fact for DMR:
- Whistler TRX-1 / TRX-2: DMR and NXDN are included in the box — no extra unlock, no per-serial fee.
- Uniden SDS100 / SDS200: superb True I/Q front end and excellent DMR decoding, but several Uniden models have historically treated DMR/NXDN as a paid firmware upgrade tied to the serial number. Confirm the exact unit’s current firmware status before you buy if DMR is the reason you’re buying.
- GopherTrunk on a $30 RTL-SDR: decodes DMR free, forever, with no per-mode charge.
Read the fine print. A Uniden scanner listed as “digital” is not automatically DMR-ready. If DMR is your target mode, a Whistler TRX or GopherTrunk avoids the upgrade question entirely.
Quick picks
Whistler TRX-1 / TRX-2
around $550–$600
DMR and NXDN decoding included with no upgrade fee. TRX-1 is the handheld; TRX-2 is base/mobile. Object-oriented database scanning.
TRX-1 on Amazon →Uniden SDS100 / SDS200
around $650
True I/Q decoding is the best in class for weak or simulcast-adjacent DMR — but check whether the DMR upgrade is already unlocked.
SDS100 on Amazon →RTL-SDR + GopherTrunk
around $30
Decodes DMR Tier II/III, reads color codes and talkgroups, records every call — no per-mode upgrade fee. Needs a PC.
Get GopherTrunk →Full comparison
| Scanner | Form | DMR included? | Tier II/III | Programming | Approx. price |
|---|---|---|---|---|---|
| Whistler TRX-1 | Handheld | Yes, no fee | II + III | DB / SW | ~$550 |
| Whistler TRX-2 | Base/mobile | Yes, no fee | II + III | DB / SW | ~$600 |
| Uniden SDS100 | Handheld | Sometimes paid | II + III | ZIP / DB | ~$650 |
| Uniden SDS200 | Base/mobile | Sometimes paid | II + III | ZIP / DB | ~$650 |
| SDR + GopherTrunk | PC + dongle | Yes, free | II + III | Config file | ~$30 (free SW) |
Color codes, tiers, and what “trunk-tracking” means
- Color code (0–15). DMR’s network identifier — it separates overlapping repeaters sharing a frequency, like a digital CTCSS tone. Trunk-tracking scanners and GopherTrunk read it from the control channel automatically; you only set it by hand on conventional single-repeater listening.
- Tier II (conventional). Two-slot TDMA on a fixed frequency pair. Common for business, utilities, and some agencies. Any DMR-capable radio here handles it.
- Tier III (trunked). Full DMR trunking that steers calls across channels via a control channel. This is where trunk-tracking matters — the Whistler TRX and GopherTrunk follow it; a plain analog radio cannot.
- Talkgroups. DMR organizes users into talkgroups; a good scanner lets you follow, hold, or lock out each one.
The free DMR route: GopherTrunk on an SDR
A ~$30 RTL-SDR plus free GopherTrunk on a PC decodes DMR Tier II and Tier III, reads color codes and talkgroups, follows the control channel, and records and timestamps every call. There is no per-mode upgrade fee — the exact charge that can add cost to a Uniden. The trade-off is a computer and setup versus a scanner’s turnkey portability; the full police scanner vs SDR page lays it out.
Bottom line
For DMR specifically, the Whistler TRX-1/TRX-2 is the safest buy because DMR is included with no upgrade fee. The Uniden SDS100/SDS200 has the better front end and is the pick if you also chase weak P25 simulcast — just confirm the DMR unlock first. And if you own a PC, a $30 RTL-SDR + GopherTrunk decodes DMR free and records everything. As always, no scanner or SDR decodes encrypted DMR — buy for the talkgroups still in the clear, and see the full best police scanners guide.
Frequently asked questions
What is the best DMR scanner in 2026?
The Whistler TRX-1 (handheld) and TRX-2 (base/mobile) are the best value because DMR decoding is included with no upgrade fee. The Uniden SDS100/SDS200 also decode DMR with the best front end, but Uniden radios sometimes require a paid DMR upgrade. For zero hardware cost, a $30 RTL-SDR plus free GopherTrunk decodes DMR too.
Do I have to pay extra for DMR on a Uniden scanner?
Sometimes. Several Uniden models ship P25-ready but treat DMR (and NXDN) as a paid firmware upgrade unlocked per-serial-number. Whistler’s TRX-1 and TRX-2 include DMR and NXDN in the box. Check the exact model’s current firmware status before buying if DMR is your priority.
What is a DMR color code and do I need to set it?
A DMR color code (0–15) is the network identifier that distinguishes overlapping repeaters on the same frequency, like a CTCSS tone for digital. Modern trunk-tracking scanners and GopherTrunk read it automatically from the control channel; you rarely enter it by hand except on conventional single-repeater setups.
What is the difference between DMR Tier II and Tier III?
Tier II is conventional two-slot TDMA on a fixed frequency pair — common for business, utilities, and some public safety. Tier III is fully trunked DMR that steers calls across channels via a control channel. A good DMR scanner should trunk-track Tier III; GopherTrunk and the Whistler TRX follow both.
Can a DMR scanner decode encrypted DMR?
No. Neither a Whistler TRX, a Uniden scanner, nor an SDR can decode encrypted DMR (basic privacy, enhanced/AES, or proprietary). Encryption is a cryptographic and legal wall. Buy for the DMR talkgroups still transmitted in the clear.
Can I decode DMR for free with GopherTrunk?
Yes. A ~$30 RTL-SDR dongle plus free GopherTrunk on a PC decodes DMR Tier II and Tier III, reads color codes and talkgroups, follows the control channel, and records every call with timestamps — no per-mode upgrade fee ever.