To connect Rotimatic to a mobile phone hotspot, you would require two mobile phones.
Phone 1 (Hotspot provider): Enable the hotspot option. Ensure the phone has cellular data and is connected to the mobile internet. Ensure that the phone name is Alphanumerical.
Phone 2 (Has the Rotimatic Mobile App):
 Enable the wifi option and connect to phone 1. Disable the cellular data on phone 2. 

Please watch the videos below for a better understanding on how to connect your Rotimatic to a mobile hotspot.
Hotspot for Android:

Hotspot for iPhone:

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