Modem & Baseband Stock

Latest modem versions are available for 
XT1514 , XT1523 , XT1524 , XT1527

Modem Files can be found here (thanks to FuFu): 
https://mega.nz/#F!J58BFYSI!igZi4wm_tH_DsXcA7Vugwg

Simple instructions how to flash the modem/baseband you can find here:
http://forum.xda-developers.com/show...4&postcount=22
http://forum.xda-developers.com/show...7&postcount=24