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Recently many customers feedback the contacts importing of Retevis RT3S works abnormal. so we sum up the problems. if you want to import the contacts list into the Retevis RT3S, or have problems when import the contact list, please try to check again refer to the blog.  ...

change the PowerOn Logo for Retevis rt73 dual band mobile radio.  ...

10-Common-Sense-of-Maintenance-of-Walkie-Talkie-Battery  ...

Firmware is basically a set of instructions needed for certain devices to perform the tasks that they were made for. we recommends that you update the firmware on your radio whenever new firmware becomes available. New firmware often fixes bugs, contains new features.   ...

We know that the shortest distance is straight line between two points. but it's often not simple when hams communicate with each other from around the world. Because it's not the shortest distance geographically if we connect two points directly on world map, we need to select the right direction of antenna to achieve the better communication effect. Especially for directional antennas, such as Yagi antennas. we must rely on the great circle Maps.  ...

We know when we upgrade the firmware or initialize the Ailunce HD1, the radio need to be in the right mode, such as it must in DFU mode, when we upgrade the firmware. Then when we program the Aliunce HD1, must the Ailunce HD1 be in a particular state?  ...

Hams come from all around of the world. so sometiome we don't know anything about our contacts though we uaual make QSO with each other. If you import the contact list including the frequently used contacts into your Retevis RT3S, the radio will show the basic information when they call you. so how to show contact information on Retevis RT3S?  ...

After upgrade the AilunceHS2 firmware V1.32, you can save memory channels on AilunceHS2. Today, let us learn how to save memory channels on HS2.  ...

A very intersting Chinese driver updating tool to solve HS2 firmware update problem.  ...

Due to design, every key of Ailunce HS2 has more than one function. There are total 30 keys in the front pannel of Ailunce HS2. We have summarized the basic key functions except for 10 numberic and 4 direction keys in the blog. If you're the user of Ailunce HS2, please refer to the blog or contact us feel free.  ...