Here are Screenshots of APN and MMS Settings for H20 Wireless, that you can use on your Galaxy S4 or HTC One. This will get you Data services (If you have plans with Data). It’s important you have ATT.MVNO as your APN. Name: H2O Wireless APN: a t t . m v n o Proxy: Not set Port: Not set Username: Not set Password: Not set Server: Not set MMSC: MMS Proxy: proxy.mvn o.H2OMobileweb. com MMS Port: 80 MCC: 310 MNC: 410 Authentication Type: Not set APN Type: Not set APN Protocol: IPv4 h20 mvno apn settings galaxy s4 h20 mvno settings htc one galaxy s4