Pair your computer or modern phone with the Nokia E71 and send the JAR file wirelessly.
Java apps share a limited heap size. If an app crashes unexpectedly, close background Symbian tasks by holding down the Home key and terminating unused applications. free download jar file nokia e71 link
Because the software certificates for these old applications have expired, your E71 will likely show a warning stating "Trusted supplier required" or "Expired certificate." Pair your computer or modern phone with the