Hi guys. I have had this happen to me. when getting 2G signal and someone call you, if your using data services the call will go toVM. With edge or 3G voice and data connections can occur at the same time. I'vwe tested this, not on my n900 & can asure you this is the case. It easy to test, just call cell phone from landline or other cell when in 2G mode. Sometimes when using active sync you may find you get VM when the phone did not ring. Thats why, in 2G mode & data in use.