flex.less in phone have some bug

[bluemsn]

Are you in the phone's browser to test it, the phone does not support the latest to standards, have problems in your code！ I can be on the computer, but the phone, there is a big problem,Can you help me ? why??

[dignifiedquire]

Phone is a rather wide spectrum, what operating systems and versions are you talking about?
If you take a look at the support on caniuse/flexbox you see that the overall support on mobile is not very great, though there are some fallback tricks that work.