Here is how to put verizon iphone 4 into diagnostic mode

[ElBerryKM13]

try this-

*5005*3424# then call to enable, then

*5005*342444# then call to enable, then

*5005*3424255# then call to enable.

that will get it to show up

Still nothing.. can you write mdn/min with ws yet?

[arsenist]

Still nothing.. can you write mdn/min with ws yet?

yea nothing happens i tried it a few times.

[xxSLRxx]

I've been trying these very same codes literally since day one, and I've never found a com port using any of these codes. There has to be something else you are doing that we are missing. I'm curious but is there anything special about your iPhone? Is your iPhone on an active line and do you have the tethering feature?

Also, thanks for sharing the information.