20 Most Recent Uniden GMR638-2CK (22 Channels) 2-Way Radio Questions & Answers

In order to assist you, I need more information. Are you seeing that message on the screen? Are you using the correct AC adapter? Please provide me with more information.

Uniden... | Answered on Jun 26, 2015

Press PTT and see its break receiving. Also change the Rx frequency or change the channel which not receiving, adjust the squelch level.

Uniden... | Answered on Jun 23, 2015

Subtone is great, also check all frequencies for activity. Channels 1-7 typically have less use because they are limited to 0.5 watts.

Uniden... | Answered on May 05, 2015

I don't know where you are located, but I have a feeling that you are using two incompatible systems.
The PMR (Personal Mobil Radio) is build for the European market. The allocated frequencies for it's 8 channels are from 446.00625 Mhz to 446.09375 Mhz. Your Motorola is for the US market GMRS (General Mobile Radio Service) and FRS (Family Radio Service) and it's channels are allocated from 462 Mhz and 467 Mhz area.

Bottom line is, since their channels are on different frequencies, they can't talk to each other.

BTW, it would be illegal to use the European radio in the US and visa versa. You could be interferring with other radio services.

Uniden... | Answered on Jun 20, 2014

See the instructions in the fourth column on the first page of the manual at http://www.uniden.com/content/ebiz/uniden/resources/ownersmanuals/GMR638-2CKom.pdf

Uniden... | Answered on May 19, 2013

If you're asking about a Uniden DECT 6.0 phone, select the model from the list beginning here to download a copy of the manual.

Uniden... | Answered on Mar 05, 2013

Eighteen miles will never happen unless you're transmitting between two hilltops with a lake between them. The UHF band that GMRS radios operate in is strictly line-of-sight -- if you can't see the other party, he can't hear you. Mileage claims by the radio manufacturers are unrealistic pipe dreams, and the 1/2 mile range you're getting now is very typical..

Uniden... | Answered on Aug 07, 2010

any of the number as long as they are both on the same channel

Uniden... | Answered on Jan 17, 2010

it means error 1,try rebooting the base

Uniden... | Answered on Oct 22, 2009

if you cant hear it well check if your on the right channel and make sure you can receive or your speaker is broken

Uniden... | Answered on Sep 14, 2009

Go to Menu then select System Reset, then selct Replacing base, then answer Yes. This will advise you to place in base to register and it will do so in about 5 seconds.

Kindly rate the answer

Uniden... | Answered on Jul 01, 2009

on this probablaby is a tone that has to be swithed off using the menu button and another up and down.use menu till 1 is flashing then press down till 1 says 0. this should fix problem

Uniden... | Answered on May 24, 2009

first they are not a phone, they are a 2 way radio walkie talkie and will not work for telephone communication.

Uniden... | Answered on Apr 14, 2009

Press and hold the plus (+) while you turn the radio on.

Uniden... | Answered on Dec 27, 2008

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