Remember the reception test carried by Swedish? They later tested again, and found that there is no problem of iPhone’s hardware. That means it’s AT&T problem. An internal memo reveals that poor reception is still caused by iPhone.

All mobiles request little power from GSM networks’ transmitter. If there are lots of iPhone asking the transmitter for the power, transmitter will start to shut down. As a result, 3G connection will be lost.

Unlike other mobiles, iPhone requests too many powers (more than normal) from transmitter. That’s why it caused the transmitter shut down a lot. The latest iPhone 2.0.2 firmware update reduced the power, that’s why it can improve 3G connection. If all the iPhone users updated, the power may be solved. But, if not all the users update to the latest 2.0.2 firmware, that means there are still some iPhone requesting high power from transmitter. Guys, jailbreak is here, please update and help to improve the connection.

[via CrunchGear]