I have a Huawei smartphone.
Unfortunately, I'm not really satisfied with the volume of the headphones (there's no jack socket on the phone)
I'm specifically looking for in-ear headphones that still deliver a high volume.
Either via bluetooth or via cable (Usb-C).
It should definitely be in ear headphones.
It doesn't necessarily have to be a high-end product, but the brand and price are still of secondary importance to me.
Samsung Galaxy Buds +, they are currently very cheap and have a decent performance
I've been using Beats in-ear headphones for over 3 years. I'm very happy with it because the volume can be set very high. When I sometimes use my friend's AirPods, this difference usually only becomes apparent to me!
There are different models and I specifically have one that also increases the bass.
Are both models which you don't buy because of the sound.
If you want something really loud, then you get a USB-C to USB adapter, an AMP and jack headphones. Can turn up loud that your ears fly away and the battery is literally taught, but this will be worth it.