Onnet vs. Offnet

This post shall actually be published one day in March :-) I haven't remembered precisely anymore the thing I want to address except that as indicated by the title. Maybe I'll just go for a rough idea.

I was trying to model traffic (relations, matrices, etc.) between operators. To obtain realistic results I had to assume a quite high factor for onnet traffic. That onnet traffic shall be higher than offnet, it is intuitively justified, because the operators always try to increase their customer base with many attractive marketing efforts, pricing schemes or other policies. Rough speaking, I had to use onnet factors in the range of 0.60 to 0.75. This was, informally, justified by some technical persons in the operators.

Recently, in a local/regional newspaper somebody said that "offnet traffic is still higher than onnet traffic though after promotional and marketing efforts" (-they don't charge for onnet traffic-). Is that really true ?? They said that onnet traffic comes at most to a figure around 40%. Right now, I could not give some numbers to argue against this. If this would really be the case, then in the traffic models between operators several things have to be taken into account:

• onnet and offnet traffic factors shall be a function of customer base
• types of networks (mobile cellular, mobile FWA)
• etc. ?
  

Below are some facts from the press:

• Flexi Jawa Barat, Banten --> onnet 40%; approx. 500.000 subscribers (around 5% of the total mobile/FWA subscribers in Jabar, Banten)