Been working on this project for a while and finally released it. Time to unpack your old CDMA phones.
1xBTS is everything you need to run a full CDMA network (from RF to all core components). It's still a WIP but you can already do a lot (voice calls, SIP -> PSTN gateway, SMS, and basic packet data).
You'll need a LimeSDR, USRP B2xx, or bladeRF to try it out.
Site: https://1xbts.org
After Sprint and Verizon Wireless shut down their CDMA networks in the United States back in 2022, it was previously thought that all CDMA-based cell phones were doomed to be obsolete, unlike GSM cell phones with the Osmocom project. Thanks to the dedication of a single individual, u/xoclipse, old CDMA phones can be used once again!
The functionality of the base station is still heavily being worked on, with no guarantee for compatibility and glitches. However it's already enough to allow many CDMA phones to acquire the system and update the clock, or even receive SMS/calls, which might not be possible without the project (many CDMA phones don't have a manual setting for date/time). It's incredible to finally use CDMA phones just as they are meant to be.
Truly amazing project 1xbts.org !