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Firmware · 2025-03-24

Uniden SDS100 firmware 1.23.15 main / 1.03.06 sub

Verified — manufacturer file

Download zip (2.1 MB) Manufacturer's page ↗

Main firmware 1.23.15 (24 March 2025) with sub firmware 1.03.06 (11 July 2024). 1.23.15 added DMR Tier III multi-block voice-channel grants, better Capacity Max late-entry detection and the SQW and BLU weather EAS event codes; sub 1.03.06 raised the audio level in Waterfall AM mode.

Read before installing. Posted by Uniden on 17 October 2025, when 1.23.20/1.03.15 was released, as the way back to the previous release. Main and sub must be downgraded together. Uniden's readme spells the files "SDS100_V1_23_15.bin" and "SDS100-SUB_V1_03_06.firm"; the files in the package are SDS-100_V1_23_15.bin and SDS-100-SUB_V1_03_06.firm.
Product
SDS100 firmware
Version
1.23.15 main / 1.03.06 sub
Released
2025-03-24
Runs on
Any PC that can copy files to a USB mass-storage device (Uniden's steps use Windows Explorer)
Applies to
Uniden SDS100
Zip SHA-256
b0109a675931d577f8b4f33a80cef79e587f491f531863a7fdcc3c913a982905

Contents

FileSizeSHA-256
SDS100_V1.23.15_Main_V1.03.06_Sub.zip2.1 MB3d8ad2e5ab38d582ac410efb071a104484a6b130dda46e3ac229bd5ad4f9d38e
README.txtThese instructions
SHA256SUMSChecksums of the files above

Instructions

The complete README.txt included in the zip:

Uniden SDS100 firmware 1.23.15 main / 1.03.06 sub
=================================================

WHAT THIS IS
Main firmware 1.23.15 (24 March 2025) with sub firmware 1.03.06 (11 July
2024). 1.23.15 added DMR Tier III multi-block voice-channel grants, better
Capacity Max late-entry detection and the SQW and BLU weather EAS event codes;
sub 1.03.06 raised the audio level in Waterfall AM mode.

IMPORTANT: Posted by Uniden on 17 October 2025, when 1.23.20/1.03.15 was
released, as the way back to the previous release. Main and sub must be
downgraded together. Uniden's readme spells the files "SDS100_V1_23_15.bin"
and "SDS100-SUB_V1_03_06.firm"; the files in the package are
SDS-100_V1_23_15.bin and SDS-100-SUB_V1_03_06.firm.

Uniden normally delivers firmware only through Sentinel (UPDATE -> Update
Firmware), which always installs the newest version. Uniden published this
package on its change-log page so that owners can install this specific
version by hand - in practice, to go back to it. To bring a scanner up to
date, use Sentinel instead.

APPLIES TO
The Uniden SDS100 (US model) only. Every firmware file carries the model name
(SDS-100_...). Do not use it on the SDS200, SDS150, BCD436HP or BCD536HP. The
European SDS100E uses separately named firmware files (e.g.
SDS100E_V1_23_09.bin, per RadioReference owners) and must not be given these
files.

BEFORE STARTING
  - A Windows PC. Uniden's instructions use Windows Explorer; the scanner
    appears as an ordinary removable disk.
  - The mini-USB data cable, in the mini-USB port on the side of the scanner
    (the one marked Charge, not the micro-USB port).
  - A fully charged battery (Uniden's readme asks for this), or the scanner on
    USB charge.
  - A backup: copy the whole microSD card to the PC and save the Favorites
    Lists in Sentinel first (Uniden's readme asks for both).

CONTENTS OF THIS ZIP
The download zip holds the vendor file exactly as Uniden published it, plus
this README.txt and SHA256SUMS.

  SDS100_V1.23.15_Main_V1.03.06_Sub.zip  (2226379 bytes)
    SHA-256 3d8ad2e5ab38d582ac410efb071a104484a6b130dda46e3ac229bd5ad4f9d38e

  Inside SDS100_V1.23.15_Main_V1.03.06_Sub.zip:
    SDS100 V1.23.15 Main V1.03.06 Sub/Readme SDS100 V1_23_15.txt
      Uniden's own instructions (downgrade to 1.23.15)
      2414 bytes
      SHA-256 9eff6175e088ec928366ce31e4fedd72a795cc5019dd65bb2dd9dc07e4bd430f
    SDS100 V1.23.15 Main V1.03.06 Sub/SDS-100_V1_23_15.bin
      main (CPU) firmware 1.23.15
      2162688 bytes
      SHA-256 e672d0aa0f8da869c703db73bd24b4590920536b61d665e8eb69c76865bb7b02
    SDS100 V1.23.15 Main V1.03.06 Sub/SDS-100-SUB_V1_03_06.firm
      sub-processor firmware 1.03.06
      90000 bytes
      SHA-256 8fdc06fed613c5d618809130a3b565b95c4587ceb6d6319786bb58317361d3ac

INSTALLATION
  1. Turn the scanner on.
  2. Connect it to the PC with the USB cable. The scanner shows "USB Cable
     Detected / Select USB mode" with "Mass Storage = E" and "Serial Port =
     .".
  3. Press E (Yes) to choose Mass Storage. The scanner shows "USB Mass
     Storage".
  4. In Windows Explorer, open the new removable disk, then the "BCDx36HP"
     folder, then its "firmware" folder. It already holds CitiTable_V00_00.dat
     and ZipTable_V00_00.dat - do not touch or delete them.
  5. Unzip the download on the PC and copy SDS-100_V1_23_15.bin and
     SDS-100-SUB_V1_03_06.firm into the "firmware" folder. Only one main
     (.bin) and one sub (.firm) file may be in the folder at a time; with
     several versions present the update will not start or will load
     incorrectly.
  6. Restart the scanner ("reset the power", in Uniden's words). The update
     starts automatically as it boots. Do not turn the scanner off until the
     update has finished.
  7. When it has finished, the scanner deletes the firmware file(s) from the
     "firmware" folder by itself.

VERIFYING
Menu -> Settings -> See Scanner Information -> Firmware Version shows the main
and sub versions now installed. The firmware file(s) will also have gone from
the card's "firmware" folder.

IF SOMETHING GOES WRONG
  - Update did not start: check that only one main and one sub file are in the
    "firmware" folder and that the file names are exactly as supplied.
  - Scanner will not start properly after files were deleted from the
    "firmware" folder: the two .dat files were probably removed. Uniden's
    remedy is Sentinel -> Clear User Data, which rebuilds the card but erases
    all user data (hence the backup).
  - USB connection fails or is slow: take the microSD card out and use a card
    reader; Sentinel can work on the card directly (see Vol 5 on this site).
    The same folder layout applies.
  - Card errors: back up what is readable, format the card with the SD
    Association's SD Memory Card Formatter (cards up to 32 GB), run Sentinel
    -> Clear User Data, then Update Firmware.
  - Uniden does not document a recovery procedure for an update interrupted by
    power loss; this could not be confirmed from any source. Uniden's readme
    closes with "Please use these files on your risk."

DOWNGRADING
This package exists for going back: Uniden's readme covers moving from 1.23.20
(main and sub together). Main and sub must be changed together. To return to
the current version afterwards, run Sentinel -> UPDATE -> Update Firmware.

PROVENANCE
  - Official source:
    https://info.uniden.com/twiki/pub/UnidenMan4/SDS100FirmwareUpdate/SDS100_V1.23.15_Main_V1.03.06_Sub.zip
  - Listed on:
    https://info.uniden.com/twiki/bin/view/UnidenMan4/SDS100FirmwareUpdate
  - Wayback copy:
    https://web.archive.org/web/20260101191259/https://info.uniden.com/twiki/pub/UnidenMan4/SDS100FirmwareUpdate/SDS100_V1.23.15_Main_V1.03.06_Sub.zip
  - Retrieved: 2026-09-18. Status: verified (downloaded from Uniden's own
    server; SHA-1 matches the Wayback capture).

MORE INFORMATION
  - scanners.fubsypoly.com, Uniden SDS100 - Vol 5, Upgrades & Firmware:
    https://scanners.fubsypoly.com/uniden-sds100/vol-5/
  - Reference Library, SDS100 Owner's Manual:
    https://scanners.fubsypoly.com/library/uniden-sds100-original-manual/
  - Reference Library, Easier to Read SDS100/SDS200 Manual:
    https://scanners.fubsypoly.com/library/easier-to-read-sds100-200-manual/
  - Uniden change log:
    https://info.uniden.com/twiki/bin/view/UnidenMan4/SDS100FirmwareUpdate

Other versions of SDS100 firmware

← All Uniden SDS100 downloads