GE Wireless Phone, Model 27909EE1-A

I replaced the battery in the handset 2 yrs. ago & I can’t re-program the phone. Also, need to preserve 4 mssgs. and erase others for current use. Help!

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

crwdns2934109:0crwdne2934109:0

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