Attached android is not powering OTG USB

Dear virtual here,
Our android in the link below does not seem to connect with our USB app through the micro usb on it. We know other Androids connect perfectly with our app. We are interested in getting this Android to work with your virtual here.
We plan on purchasing a substantial amount of licenses whenever we can power up our smartphone


What is your USB app? Note , not all smartphones support USB OTG because it may require more power than the port can provide. Especially cheap phone like these.