connecting Node2i with a mobile phone in another wifi network

In the working wifi network (which I can't interfere with) I tried Node2i, after switching on it is set to receive, the blue LED is lit. I'm looking for Node2i on my mobile via the BluOs app, but unfortunately I can't find anything, it's still searching. Tested with two different mobile phones, wifi set up and working. At home the connection via wifi is OK. Is there anything else you need to set up somewhere? A fixed network connection to Node2i cannot be performed. I can solve everything via mobile.

Thanks in advance for your response.

Pavel Bláha -Czech Republic