Convert .jar To .vxp Upd -
Download and install the (v2.0 or v3.0 depending on your target phone's firmware).
This usually occurs due to a mismatch between the MIDP version requested by the JAR file (e.g., MIDP 2.1) and the capabilities of the VXP wrapper engine (which often maxes out at MIDP 2.0 specs). Convert .jar To .vxp UPD
Once you have a .vxp file, installation is relatively straightforward: Download and install the (v2