[inquisitor]

All versions of Mobile Partner include a generic driver, which works with any Huawei USB-modem including the EM770 data card, which actually is a USB device with MiniPCIe-interface. No matter which version of Mobile Partner you install, it should work with any other Huawei USB-modem. I don't know why Mobile Partner didn't detect your E220, but on my system the Asus Mobile Partner recognizes my E169 and E180 flawlessly.

Regarding your question on Tchibo, I haven't compared performance of a Tchibo SIM to a O2 postpaid SIM, but from what I read on telefon-treff.de there is no difference. As a O2 postpaid customer I've seen very slow throughput (< 200 KBit/s) despite of HSPA-coverage, too. As you may know bandwidth is dependant on a lot of factors, e.g. the available network technology (GPRS/EDGE/UMTS/HSPA), signal strength/quality, current load on the serving cell and on the backhaul. O2 may suffer from overloads or lacking HSPA-support in some places, but they still have the best cost-benefit-ratio. Vodafone and T-Mobile don't even offer prepaid flatrates and the eplus network, which still doesn't support HSPA, is total crap.