Here you can find the H2O Wireless APN Settings for your Android as well as for your Windows and iPhone. You can see on the sidebar how to add the APN setting from H2O wireless into your mobile phone. You can find those here and here as well as here. The first settings is for the iPhone and the remainder at the bottom is the APN settings for the H2O wireless further down for Android and Windows.
H2O Wireless APN Settings
Much like other APN settings for the iPhone you will only need the following. Note that it is only the APN name that you will need as the username as well as the password are <blank> So take note of this. The Windows and Android APN settings are further down the page.
Username: (leave this section blank)
Password: (leave this section blank)
See the H2O wireless network is a reseller of AT&T and their APN settings will not work on their network. the att.mvno is the only setting you will need with the iPhone. The android and Windows settings are listed below. See the sidebar if you are not sure how to add the settings to your mobile phone. You will also see that most of the settings are left at their default and are <blank>.
Name: H2O Wireless
The MMS Port:
APN type: default
The APN protocol: IPv4
APN protocol: IPv4
The first two settings are needed while the MCC and MNC needs to be added. Everything else is left <blank> just as you found it. You can search this website for more details as to how best to add these settings to your mobile phone. You can best start on the sidebar of the website.