You could make your M50x's Bluetooth with an adapter (there are some companies that makes them but I recommend FiiO the most, spending ~50 bucks. Let's get this out of the way, the M50xBT sucks in comparison to the 1000XM3's. If you love the M50x's sound I recommend you buy the adapter, but personally I would easily pick the Sony's, much more comfortable, better built, better sound (for my preferences), a TON of functions, it is just much more modern and supports almost all the Bluetooth codes, the Bluetooth range is MUCH better than the audio technicas. You can tune them to how you want them to sound through the app (through a certain extent obviously). The Sony's have touch controls, ANC (one of the best out there) with various modes and levels of attenuation. The M50xBT however have more battery, 40 hours vs the 25 - 30 hours of the Sonys listed respectively on each site. The M50xBT has APTX as the highest standard codec and Bluetooth 4.0 while the 1000xm3's have LDAC has the highest standard codec and Bluetooth 5.0.thank you for your costly time,
i will look into your option,
right now i was thinking about buying M50xBT or Sony WH--1000XM3
which one should i choose? main motive listening high quality sound and mostly for Phone listener too.
So, personally I would pick up the 1000XM3's without thinking twice, they offer you a much greater amount of stuff for the money in comparison to the M50xBT's. You can find them used for 250$ if you're lucky, if you buy them new, no problem! They're totally worthy the 100 bucks over the Audio Technicas.