Huge data consumption

Hi.

I have an iPhone 5 in 6.1.2 JB And since the last 2 months i've noticied a big increase in data consumption.

I've installed inetusage from cydia and the problem seems to be in something the program calls "springboard".

In one day of small Internet usage, "springboard" costed me 12mb of data usage.

Does anyone know what springboard refers to?

Thanks in advanced