I bought mtn mifi

My MTN MIFI keeps showing this "MTN_4G_6C2560" Instead of Bobby and I can't access the site for the past 4days...

I try to connect my MTN 4G broadband mifi device with my phone through wi-fi, is telling me out of data while I have 6GB data on my device

I reset my mtn mifi but I've lost the default password

I'm simply asking for how to rest my mtn mifi...