# Danger zone

You are about to enter the land of pain. Continue on your own risk.

Some radios are actually identical to others. They also identify themselves as a different radio. An example for such a radio is the Retevis RT3S, this radio is simply a relabeled TyT MD-UV390. The RT3S actually identifies itself as a MD-UV390. From the perspective of the CPS, these two radios are indistinguishable. Consequently, qdmr and `dmrconf` will always identify the RT3S as a MD-UV390.

There are, however, virtually identical radios. These are radios that actually identify themselves as different models but the firmware, communication protocol and codeplug is basically identical to another model. An example for such virtually identical models are the AnyTone AT-D868UV and the BTech DMR-6X2. Each model identifies itself correspondingly and thus is distinguished by the CPS. Some of these relationships between virtually identical models are known to qdmr and `dmrconf`. In these cases, the CPS will treat these radios as identical.

Some of these close relationships between models are not known to `dmrconf`. In these cases, `dmrconf` will stop with an error that a radio is unknown although it actually supported as a different model. In these rare cases, it is possible to override the radio detection using the `--radio` option.

This option is usually used to specify the type whenever the radio model is not detected. This option also overrides the model detection and thus allows to handle virtually identical radios. For example, if the relation ship between the AT-D868UV and the DMR-6X2 would have not been known to `dmrconf`, a codeplug could read anyway from the device by calling

    dmrconf read --radio=d868uv codeplug_6x2.yaml

Here the radio detection (resulting the detection of a DMR-6X2) gets overridden and the radio is handled as a AT-D868UV.

If you know of such virtually identical radios that `dmrconf` does not recognize, consider filing an issue at the bug tracker.

Of cause, handling a radio differently as it identifies itself may cause permanent damage to the radio. So you should be very sure that the radios are actually identical when overriding the radio detection routines.