UNIDEN SDS 100 upgrade keys

ripo66

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Mar 29, 2025
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Hey guys, I need to understand something. Is the SDS100 blocked on certain frequencies?? While the SDS100E is open to all frequencies? Is that correct? Can anyone verify this?
Does anyone know which frequencies are blocked on the SDS100?
 

hexagon_keyhole

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Hey guys, I need to understand something. Is the SDS100 blocked on certain frequencies?? While the SDS100E is open to all frequencies? Is that correct? Can anyone verify this?
Does anyone know which frequencies are blocked on the SDS100?
The SDS100 has gaps in coverage from 824–849 MHz and 869–894 MHz due to antiquated U.S. regulations restricting access to certain cellular bands. Honestly, I don’t even think there’s a thing to listen to on the blocked bands.
 

EAFrizzle

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Upgrade keys are generated by the serial number of the scanner, correct? If so, then the proper key and checksum should be generated with a given serial number, no matter what the model is...unless Uniden was silly enough to reuse serial numbers in different variations of the same model. I seriously doubt that there's an Australian and a European SDS100/200 out there with the same serial numbers as my two US models.

Or are there?
 

ripo66

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Mar 29, 2025
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The SDS100 has gaps in coverage from 824–849 MHz and 869–894 MHz due to antiquated U.S. regulations restricting access to certain cellular bands. Honestly, I don’t even think there’s a thing to listen to on the blocked bands.
On the other hand, in the SDS100E, the European version, there is no frequency blocking at all?? Does that mean there is full coverage of all frequencies? 824–849 MHz and 869–894 as well?
 

ripo66

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Upgrade keys are generated by the serial number of the scanner, correct? If so, then the proper key and checksum should be generated with a given serial number, no matter what the model is...unless Uniden was silly enough to reuse serial numbers in different variations of the same model. I seriously doubt that there's an Australian and a European SDS100/200 out there with the same serial numbers as my two US models.

Or are there?
I'm not sure I understand what you mean? As far as I understand from the forum, there are 3 versions of the SDS100 device: the European version, the Australian version, and the American version
 

ripo66

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Maybe I'm wrong then?

@ripo66 give it a try and see what happens. It's only money afterall.
ok i can try it .. but now i found that the sds100 has Some frequencies are blocked, while in the SDS100E, all frequencies are open without exception .... it this true?
 

kc2asb

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ok i can try it .. but now i found that the sds100 has Some frequencies are blocked, while in the SDS100E, all frequencies are open without exception .... it this true?
The SDS100 (and all other such radios sold in the US) have the 800mhz cellular phone frequencies blocked. Has been that way since the Electronic Communications Privacy Act was passed into US law 1986.
 
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EAFrizzle

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Upgrade keys are generated by the serial number of the scanner, correct? If so, then the proper key and checksum should be generated with a given serial number, no matter what the model is...unless Uniden was silly enough to reuse serial numbers in different variations of the same model. I seriously doubt that there's an Australian and a European SDS100/200 out there with the same serial numbers as my two US models.

Or are there?
 

EAFrizzle

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ok i can try it .. but now i found that the sds100 has Some frequencies are blocked, while in the SDS100E, all frequencies are open without exception .... it this true?

The keys for unlocking DMR/NXDN/EDACS-ProVoice are only for modulation schema. These capabilities are already in the scanner. They have nothing to do with regional bandplans or protecting politicians from cellphone listeners.
 

EAFrizzle

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Seriously, if a modulation upgrade key changed the bandplan in a scanner, what's to stop me from buying a non-USA key and getting the "forbidden" ancient cellphone frequencies restored to my rigs?
 

ripo66

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Seriously, if a modulation upgrade key changed the bandplan in a scanner, what's to stop me from buying a non-USA key and getting the "forbidden" ancient cellphone frequencies restored to my rigs?
But now I'm discovering something else... that I didn't know before, that the SDS100E, the "European" version, is actually open to all frequencies and has no restrictions... According to AVERA, the distributor of UNIDEN in Europe...
 

ripo66

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Is there anyone in the forum who has the uniden SDS100E European version and can confirm that, indeed, all frequencies are open without restrictions?
 

ripo66

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If I compare the SDS100 model, which receives frequencies in the following ranges:
25-512 MHz
758-824 MHz
849-869 MHz
894-960 MHz
1240-1300 MHz

and compare it to the SDS100E model, which receives frequencies in the following ranges:
25-520 MHz
758-960 MHz
1240-1300 MHz

Which one covers more frequencies?
 

kc2asb

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Dec 31, 2015
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If I compare the SDS100 model, which receives frequencies in the following ranges:
25-512 MHz
758-824 MHz
849-869 MHz
894-960 MHz
1240-1300 MHz

and compare it to the SDS100E model, which receives frequencies in the following ranges:
25-520 MHz
758-960 MHz
1240-1300 MHz

Which one covers more frequencies?
The 100E
 

Randyk4661

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Garden Grove, CA
I'm going to add my two cents here,

In the U.S. you won't hear anymore with the 100E vs the U.S. 100. 512 to 520 is TV, no voice to there.
And 824 to 849 & 869 to 894 is digitally encrypted cell phones. Nothing to hear there.

NOW, if the 100E can decode Tetra or some other digital systems the U.S. version can't do, I say go for it.
 

roger51

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Nov 13, 2005
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taiwan taipei
Hello,


I have recently purchased the Uniden SDS100.


I live outside the United States and understand that it is not possible to purchase the upgrade keys through the official Uniden website.


Could you please advise on the best way to purchase the upgrade keys at a reasonable price, and if there are any dealers who offer them without overcharging?


Thanks everyone in advance for your help.
Hello,You can used this link to update your sds100, even...........https://www.scannermaster.com/Uniden_Bearcat_DIY_ProVoice_DMR_NXDN_Software_p/10-681970.htm
 
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