2 way radios wont communicate between one another.batteries are chaarged radios turn on.do not know how to set channels on them.

Try contacting Cobra directly Support Cobra Electronics Corporation

Nothing. You have already said channel, which is frequency and sub channel, which is called a lot of things. You are 99% ahead! My best guess: turn them Off and On. Then check the channel and subchannel again. One of the radios did not save the information or lock it into the memory. The On/Off cycle may save it and they will work! Let's cross our fingers. But do not hesitate to reprogram them as many as 3-5 times and look for a SAVE feature in the manual. Best of luck!

Contact Cobra support directly here: Support Cobra Electronics Corporation

Perhaps it is time for a new radio set
Support Cobra Electronics Corporation

Take the radios back to a very basic setting with all special features turned off. If the radios have a Qt filter check to see it is turned off, and set your Code to zero (off) on both units. Also, check to see your battery is good in both units. Trade the battery with a known good radio to see if the problem moves to the other radio, is a simple test.

Be sure the Channel and Code are set the same on both radios.

You need to verify you have the frequency, code and Qt filter set identically. Also, check your batteries to see if they are good.

Here is a link to the user guide: http://www.giantintl.com/RadioPDFs/Outdated%20Manuals/T59xx_User_Manual_E.pdf

You should be able to set the radio back to a simple setting with the code and Qt filter shut off (zero), this would tell you pretty quickly if your radio will communicate. If they will not communicate with the frequency set the same, and the other features turned off, you have a battery or radio problem.

Best regards.

Check your Qt filter. Set it to the off position (the minus symbol) on both radios. Once you have your Frequency, Interference Code Eliminator and Qt Filter set identical, the radios should communicate. If not, you have a radio with a problem. Or a bad battery. (Bad batteries can also cause some user problems, such as no transmit or intermittent transmit.)

Here is a link to the user's guide, the Qt filter is on page 21: http://www.giantintl.com/ContentManage/manuals/Moto/T55xx.pdf

Another test of the radios would be to put both Codes to zero and see if you can communicate without the code turned on.

I have T5720s - both have the same settings (channel 1), both are charged, but they won't communicate. They beep when you push the "talk" button, but you don't hear anything on the second radio.

Any ideas?
Thanks!
John