If you want to get your data or MMS working then here are the best android settings for Ultra Mobile.  These should also work on Windows Phone and iPhone!

Best Ultra Mobile APN settings
• Name – Ultra

• APN – wholesale

• Proxy – blank

• Port – blank

• Username – blank

• Server – blank

• MMSC – http://wholesale.mmsmvno.com/mms/wapenc

• MMS Proxy – blank

• MMS Port – blank

MCC – 310

• MNC – 260

• Authentication Type – blank

• APN Type- default,supl,mms