mysql> select callerid from sip_users where name="2202"; 
+----------------+
| callerid       |
+----------------+
| Moo Cow <2202> |
+----------------+
1 row in set (0.00 sec)

mysql> update sip_users set callerid="moo cow <2202>" where name="2202"; 
Query OK, 1 row affected (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> select callerid from sip_users where name="2202";
+----------------+
| callerid       |
+----------------+
| moo cow <2202> |
+----------------+
1 row in set (0.00 sec)