Query on Mesh Demo Master

[Akshatha]

Hi

I Am working on ESP8266-Mesh for a project and I'm using ESP8266 Mesh Demo Master to analyze the working.
I am able to build the mesh network with more than 10 ESPs and configure the router AP for ESP’s using ESP-TOUCH app.
My requirement is to send data from external device(Mobile phone) to one of the ESP which it can route to server through the Mesh network.
Each ESP will be in Station+AP mode and these AP’s are not visible if I scan through my phone, Why? Are they hidden or what could be the issue ?
Please help me with solving the above issue as soon as possible.

Thank you