H2O Wireless
For Android
APN : RESELLER
MMSC : http://mmsc.mobile.att.net
MMS proxy : proxy.mobile.att.net
MMS : port 80
MCC : 310
MNC : 410
Authentication Type : None
APN type : default,mms,supl,hipri,admin
APN protocol : IPv4
Bearer : Unspecified
If you are still experiencing issues with the APN settings above, please try this, but make sure your device is compatible with their network https://www.h2owireless.com/3gshutdown :
For Android
APN : RESELLER
MMSC : http://mmsc.mobile.att.net
MMS proxy : proxy.mobile.att.net
MMS : port 80
MCC : 310
MNC : 410
Authentication Type : None
APN type : default,mms,supl
APN protocol : IPv4
Bearer : Unspecified
Simple Mobile
For Android
APN : simple
MMSC : http://smpl.mms.msg.eng.t-mobile.com/mms/wapenc
Authentication Type : none
APN Type : default,mms,supl,hipri,admin
Ultra Mobile
For Android
APN : wholesale
MMSC : http://wholesale.mmsmvno.com/mms/wapenc
MCC : 310
MNC : 260
Authentication Type : none
APN Type : default,mms,supl,hipri,admin