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How to improve bluetooth connection

I have a chinese smartwatch, called GV30, I think they all are similar ( so it may be similar to a more common u8 ) . The bluetooth connection is very low and weak, it reaches barely 1 m from phone before disconnecting ! I don't know if it's a manufacturing defect or it's a lack of chinese-made, but i want to improve it. I have no warranty, but I am thinking about to repair myself, maybe improving antenna' s lenght or replacing bluetooth module. What do you recommend me ?

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Hi, I made an incomplete teardown guide for the smartwatch GV30, search it in the guides please, it' s incomplete because I don't want to damage something, I dont know if I found the bluetooth module, but I read also it can be incorporated in the processor mtk6260. If I need to complete the teardown , can you give me some advice please ? Thank you


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It probably only has a Class 3 Bluetooth module in it, (effective range -up to 1 metre dependent on what barriers are in the way).

Putting a longer antenna on will not solve it, because range still depends on the transmission power output of the module.

Replacing it with a Class 2 module (up to 10 metres) might be difficult because you have to find one which :

a) will fit,

b) has the same connections

c) does not draw too much more power from the battery (which it will just to get the increased transmission range you require), as this may compromise the functioning of the other components in the watch,

Here is an table which shows the power specifications of the various Bluetooth classes.

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Thank you, there is any way to verify if it is a class 3 or 2 module ? I have doubts it's a class 3 because even if it's Chinese , however it's a smartwatch, and 1m range make it unusable.


Hi, I cannot find information on who makes the watch so that you could ask them. Perhaps the maker's information may be on the documentation that came with the watch.

Alternatively you may have to open the device, locate the Bluetooth chip and read the info printed on it (if there is any) and then try to find out more about it using that information.

There is also this Don't know if it works but if it does may be of some help.


Hi OT03, thanks for that but unfortunately that is not the Class but rather the Bluetooth version used.


jayeff, you are right of course. Thanks for pointing this out. Hard to find any information about those watches. I guess we'll have to wait for the teardown from Essenza Bocciolo


Hi OT03, Given a search online shows the price is <$US30 (incl. postage) I'm not so sure of it having the higher powered Bluetooth module installed. Hopefully something will show with the teardown to indicate one way or the other.


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Does using Bluetooth ever drive you crazy with dropped connections to your desktop mouse, or with pairing and sound-quality problems on your smartphone? If so, you're not alone.

As a wireless connectivity technology, Bluetooth is designed to be relatively easy to use, and typically it requires little more than entering a four-digit PIN to instantly pair, say, a keyboard with your iPad.

And yet, for all its purported simplicity, online forums are full of users complaining about Bluetooth problems--whether it's iPhone owners looking to pair a novelty handset or a first-time laptop user just looking to turn Bluetooth on. "I cannot use Bluetooth. I don’t know what is wrong with my laptop but this problem is frustrating for me," said one user in the TechArena forum. Another user, on Tech Support Forum, wrote: "I KNOW I have bluetooth, I checked BIOS and it says it is enabled... so lost right now, and a touch frustrated."

Bluetooth mysteries appear to fall into several different categories. Some are as simple as not knowing how to turn on a Bluetooth chip in your PC or smartphone. Others include figuring out which software driver to download for your PC, or understanding how to deal with signal drops on a headset. A more problematic situation is when Bluetooth capability breaks down, through no fault of the user.

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