Score: 2/10 (Only for nostalgic enthusiasts)

Trying to play games on a BlackBerry 9720 in 2024 is an exercise in frustration. While getting games "fixed" (meaning converted to a playable format) is possible, the device's hardware limitations and the death of the BlackBerry OS ecosystem make the experience poor compared to even the cheapest modern smartphones.

If you get the error: "Download failed: The requested Kb is incorrect" – you need to edit the JAD file manually.

Tools needed: Notepad++ (on PC) or any text editor on the phone.

The fix:

The BlackBerry 9720 runs a Java Virtual Machine (JVM). It cannot run Android APKs. However, you can run standard Java ME (J2ME) games.

Many errors on the 9720 happen because you’re trying to install a JAR file directly. The fix: Convert JAR to COD using the BlackBerry Ant Tools or BB-Jar2Cod converter.

If Desktop Manager won’t recognize your phone, use a local web server.

Step-by-step:

Before we fix the issue, you must understand the "why." The BlackBerry 9720 runs on a 32-bit ARM11 processor with 512MB of RAM. Unlike modern phones, it requires games specifically compiled for BlackBerry OS 5, 6, or 7.1. Here are the three primary reasons your games are broken: