How to hard reset the bluetooth on Sennheiser MOMENTUM 2 M3IETW2 Earbuds / earphones if they are not connecting or not pairing or there is only sound out of the left ear or the right ear or you need to troubleshoot other problems, a hard reset to factory default settings can fix a lot of issues. Found in the Sennheiser MOMENTUM 2 M3IETW2 Earbuds user manual.

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