Hi
What happen whene a .jar file install in mobile device ???

JAR initiated installation process overview here

Jar files are ran inside a sanbox security model. If it not coming with extra certifications and signatures.So don't worry too much in this case.

Go ahead and install.
but I can't grantee that.Even it's inside the security sandbox there are smart ppl
in the world who can write exploits bypass that sandbox.Such like this.
http://cyberinsecure.com/new-j2me-security-vulnerabilities-affect-nokia-s40-phones/

if you want the extract exploit code , sorry bro I can't post the links to them here.
because ppl who see this specially the admins will downrate me,(which I don't need to lose hardly earned
reputation) . Please note that above link is not contain any exploit code.

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.