With completely wireless earbuds, the rule is: when the battery fails, they have to be disposed of. Not so with the Fairbuds, that allow you to replace batteries in just a few seconds. Combined with a repairable design, the earbuds should therefore have an extremely long lifetime.
Ok i never understood this. But can i ask wtf is there a certification required for using volte or vowifi ( particulary VoLTE )?
It’s easy to forget that our pocket computers are also telephones, and thus emergency calling devices. These are regulated with good reason. The operator/their partners have to test the device on their network to ensure it is compliant and emergency calls can be made as expected; they also need to build the VoLTE/VoWiFi/IMS settings for that specific network into the handset’s software before it will work - VoLTE has many complications, it is not one size fits all. Accordingly, some operators allow BYOD, while others will only whitelist the specific hardware and software combination they have tested and signed off on.