My brother was desperate for a good Symbian package signing program to zip up his creative contents to install in other phones, so I wrote him this small utility under two hours or so. What it does is simple: Take an unsigned .sis file and sign it with supplied contact information. Everything went perfectly until he test run it. It turned out that not only did Nokia phones need a signed .sis file but it must be also signed by SymbianSigned.com.