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Push Registry Activation by SMS

 
Le Ngoc Quoc Khanh
Greenhorn
Posts: 7
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I used the "Companion Code" at http://developers.sun.com/techtopics/mobility/midp/articles/pushreg/ to test push technology in MIDP 2.0.
I have customized it a little to support SMS like this:

When tested OTA and sent an "Hello from SMS" message to port 50000, I encountered IOException:

My questions are:
1. Why I have two "Starts with sms" strings?
2. What is the mecharnism when a MIDlet is activated by SMS. Why other connections did not encounter this IOException?
 
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