The H2O Wireless APN settings turn on one word, RESELLER, and H2O is specific that it “must be all CAPS”. The APN, or access point name, tells your phone how to reach the data network. The values below are copied from H2O’s SIM configuration page.

H2O Wireless APN settings for Android

H2O lists no proxy, port, username or password, so leave those empty.

H2O WirelessAPN settings forAndroid
FieldValue
NameH2O
APNRESELLER
Proxyleave blank
Portleave blank
Usernameleave blank
Passwordleave blank
MMSChttps://mmsc.mobile.att.net
MMS proxyproxy.mobile.att.net
MMS port80
MCC310
MNC410
APN typedefault,mms,supl
APN protocolIPV4

Two details are easy to miss.

The MNC depends on your SIM. It is 410 for most, and 280 if the number printed on your SIM card starts with 8901280.

APN type has to be typed with “no spaces between each type”.

H2O also sets Authentication type to None.

  1. Open Settings and find Access Point Names in the mobile network settings.
  2. Add a new APN.
  3. Enter the values from the table. Type RESELLER in capitals.
  4. Save, then select the new APN.
  5. Restart the phone and send a picture message to test.

H2O Wireless APN settings for iPhone

There is nothing to enter. H2O says of iPhones: “These settings are automatically set to the correct values when H2O Wireless SIM cards are inserted and cannot be changed.”

If data still does not work on an iPhone, H2O’s fix is a network reset, under Settings, General, Reset, Reset Network Settings. That also clears saved Wi-Fi passwords.

If it still does not work

Which network is H2O Wireless on?

H2O’s site does not name one. Its settings use AT&T’s picture-message server and AT&T’s network code, and Wikipedia’s list of MVNOs puts H2O on AT&T. Its plans are on our H2O Wireless page.

Who do I call?

H2O gives its technical support number as 1-800-643-4926.

Picture messages fail but the web works

Check the MMSC, MMS proxy and MMS port lines, and that APN type includes mms with no spaces.

  • H2O Wireless
  • APN settings