Replace OS because it lost it's original

Phone will not boot up completely. I have reset it to original, but still will not boot up completely. How can I obtain a copy of OS to reload?

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0