mcgraham89,
The first thing I would try is to use the internal calling capability of your
voip.ms account to call between your android sip client and your
voip.ms account on the OBi110. Setup a new sub-account under your
voip.ms account and setup this sub-account on your android sip client. Call your
voip.ms account registered on your OBi110 as an internal extension (which is a free call) and have this
voip.ms account set to receive the automated attendent (AA) when it receives a call from your android sip client. After the AA prompt, enter the number you wish to dial out from the OBi110. If you have a problem, I could probably test this out with csipsimple when I have a little time.