I had a problem connecting devices to the Z30 as a hot spot. It was working fine for a while, then it stopped working. It would connect devices and look like they have access to internet, but then they would not be able to access internet. I found this post, and looked at the APN. It was set to itemobile.apn. I changed it to itedata.apn and everything worked fine. i do not use this phone for voice, only for data.