RickPlatinummx5 sounds pretty good too, do you have it Rick?
I don't have that exact phone but I had the meizu mx4 last years model and it was amazing. I ended up selling it and getting a xiaomi mi4 which was decent until I dropped it now I'm using a lenovo k3 note which is an amazing phone for $150
BTW all of these unlocked phones whether OPO or Chinese/OEM will only work on GSM networks (aka t mobile at&t and metro pcs/random prepaid) granted that they support your local frequencies
For me I use t mobile so 3g data is 1900mhz WCDMA
Almost all phones will be quad band so that means SMS and voice will always work, it just depends on the data.
For 3g on at&t it's 850 1900 WCDMA and they use all of the LTE freqs especially 700
T mobile is 1700 and 2100 WCDMA or 1900 WCDMA
LTE is 1700 1900 and 2100/ 700
but yea all the meizu phones have had good custom support as far as ROMs so of you mess with custom ROMs you can usually get a lean version of android that'll make the device fly. A lot of mfg have proprietary android skins nowadays
where would you recommend buying an mx5? their website doesn't seem to be selling it