Handsfree kits not working!

Hello!

I have bought 2 handsfree kits now and they don’t work. No one can hear me!

I have a set of headphones that do seem to work, but I cycle and need earphones for under my helmet.

These are the kits I have:

Please help! It’s a real problem for me. I miss my family and friends!!

Moving here:

Also see here:

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