GeoSIMs USSD service allows a very fast and cost effective method of passing data between your remote device directly to your server. USSD is "instant" and only has a latency of a few milliseconds.

USSD message length is similar to SMS (182 alphanumeric characters in length) and can be thought of as an "instant SMS" direct to your server but without the delays or non delivery issues SMS can suffer from. Unlike SMS, USSD messages create a real-time connection during a USSD session. The connection remains open, allowing a two-way exchange of a sequence of data. This makes USSD more responsive and reliable than services that use SMS.

Unlike a typical mobile data connection, USSD does not need to set up a connection in the same way GPRS/3G does. If the device or handset is registered on a mobile network, then it's ready to send or receive data. Using USSD means there is no delay in setting up a data connection. Power consumption is also much less meaning that battery powered devices can communicate for much longer between battery recharge cycles.

Typically suited for adhoc low volume data where a continuous flow of data is not required, GeoSIMs USSD service can be used on a "Pay As You Go" basis or limited by the number of messages. This suits applications where the device may be only sending data intermittently or in low volumes.

Setting up a USSD account with GeoSIM takes just 24 to 48 hours, so you can be up and running with minimal delay and resources.