What is the programming language used in wireless devices, such as
cellular phones; 1) to write free text (similar to HTML used for
designing an iputing free text in regular web pages); and 2)to create
database (similar to MS SQL or My SQL used for creating database for
database driven web sites). We would like to hire programmers to
create software for an internet based application for cellular phones,
which will have both free text and database components. Thanks.

All you need is Java 2 Micro Edition (J2ME)

Most cellular phone can run java program with MIDP supported.
(MIDP: Mobile Information Device Profile)

The newest phone support MIDP2.0, some older phone only support MIDP1.2/1.1


MIDP information from SUN:
http://developers.sun.com/techtopics/mobility/midp/
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