What GSM/GPRS class is my modem?

[Mad ID]

Hi all,
SIM900 GPRS modem from SIMCOM is both GPRS class 10 and class 8 compatible.

How can I know what class is used during communication? What interests me the most is the peak pulse current of 2A. In class 8 its 577us, and 1.15ms for class 10. I designing a capacitor bank to deliver the peak power.

Does it depend on my network operator?

Thank you.

[Quark-elec]

Check this product which is designed based on SIM900, it can be used to control door/garage. Very helpful.
http://www.quark-elec.com/product/class/2.html