If you have an EVO, you may have suffered (after flashing back and forth between roms) issues with the 4G. As it turns out, there is a little something that is required to get the WiMax radio to work properly called RSA keys. Sometimes, they get corrupted after flashing recoveries or roms and as such, you may start having connection issues (if you can connect at all). XDA member joeykrim came up with a small app to determine if the RSA keys are still there of if they got wiped out. Getting them back can be complicated, but not impossible. It is always good practice to back these up before performing any major modification to the device.
There are several requirements to use this tool, such as root and busybox.
Please be sure that you leave some feedback for the dev after playing with this for a bit.
This application allows the user to easily find out whether or not their WiMAX RSA Keys are present. The WiMAX RSA keys are required in order for WiMAX operate properly.
Determining whether or not WiMAX RSA keys are present is a very important step in troubleshooting WiMAX connection issues.
You can find more information in the application thread.
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