This is merely a historical archive of years 2008-2021, before the migration to mailman3.
A maintained and still updated list archive can be found at https://lists.osmocom.org/hyperkitty/list/baseband-devel@lists.osmocom.org/.
Michael Spacefalcon msokolov at ivan.Harhan.ORGPeter Stuge <peter at stuge.se> wrote: > > Actually my hope is to build a quad-band phone > That would be neat too. > [...] > I was thinking about phone-as-BTS, but same principle, no > (or just the appropriate) filters. Unfortunately these two goals (quad-band support on the one hand, and filter hackability on the other hand) seem to be in conflict. It seems to me that trying to build a quad-band phone using separate antenna switch and Rx SAW filter components would be very messy, probably too messy for an RF-clean PCB layout - hence necessitating the use of an integrated RF front-end part that has all that mess hidden inside. (See ftp.ifctf.org/pub/GSM/Calypso/M034F.pdf for an example of wha I mean.) But using an integrated RF FEM like that M034F would surely preclude the possibility of filter hacking... Once again, my goal is to produce a Totally Free Phone for everyday use in one's pocket/purse, not GSM hacking - and I reason I must not be the only person on this list who desires such; I reason that there must be other lurkers on this list who watch with frustration as the years go by, there are all kinds of hacks made, but virtually zero progress toward an end-user-usable Free phone. It's obvious that OsmocomBB and FreeCalypso will always be two separate projects: the former focused on GSM hacking and security research, the latter on everyday-phone end-user needs. All I'm hoping for is that the two projects could be at least somewhat amicable, and cooperate in things like amassing hardware knowledge - rather than be all-out hostile. SF