You understand that the telephony stuff is mostly non Android right? There's a high level interface to it, but the actual android code just hooks up to telephony stuff, can't control low level details of it. (If I am wrong on this point I'd be open to seeing the low level telephony source in the Android tree..)
kris On Mon, Jan 16, 2012 at 2:04 PM, Koen Lavrijssen <lavrijssen.k...@gmail.com> wrote: > Correct me if I'm wrong (maybe you already did, kind of, but let me > try again), but there is a perfectly working 2G network which provides > me with great reception. Now a 3G network appears but the reception is > terrible. My phone connects to this 3G network, I get a call and take > it, but when it switches from 3G to 2G (because of the bad reception) > my call is dropped, even though the reception on the 2G network is top > notch. How is this not a problem with Android (as in shouldn't Android > make sure that when my 3G reception is bad/decreasing it switches over > to 2G before my call is dropped)? > > On 12 jan, 20:36, David Boettger <boettg...@gmail.com> wrote: >> These aren't really Android questions. They are related to the >> cellular network and to the baseband modem algorithms. >> >> Your phone has to be connected to a cellular network in order to >> receive voice calls and to send/receive SMS. If your phone >> disconnected from the cellular network under low signal conditions, >> you would miss calls and SMS, and would be frustrated every time you >> tried to place a call because the network re-attachment process would >> take a few seconds. >> >> Whether the phone uses 3G or 2G (or is moved from 3G to 2G during a >> call) is a function of cellular network parameters that the phone has >> no control over. It sounds like you simply don't have enough signal at >> home, or your service provider needs to optimize the network >> parameters in the cells that serve your home. Either way, this has to >> be addressed by your service provider. In the meantime, you could lock >> your phone in 2G mode and use 2G + Wi-Fi while at home. >> >> Dave >> >> On Jan 12, 4:06 am, Koen Lavrijssen <lavrijssen.k...@gmail.com> wrote: >> >> >> > The 3G coverage around my home is weak (no bar, 1 bar, 2 bars = highly >> > exceptional). >> >> > As far as I know there's no reason to connect to the 3G network when >> > the phone is on WiFi, but yet when WiFi is enabled and working my >> > phone will connect to the 3G network (not establishing a data >> > connection, but just connecting to the network). When I get a call and >> > move around a little the phone will drop from 3G to G (because of the >> > bad reception, I assume), but when that happens the call will be >> > dropped. >> >> > My suggestion: >> > - if WCDMA preferred = enabled, still ignore WCDMA during WiFi (if G >> > signal = stronger than 3G, which should be the case most of the time). >> > - somehow make sure that the G network is able to take over the call >> > over the 3G network without losing it. > > -- > unsubscribe: android-kernel+unsubscr...@googlegroups.com > website: http://groups.google.com/group/android-kernel -- unsubscribe: android-kernel+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-kernel
