android - GCM message not delivered to devices some time wifi and some time mobile data network -

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hello have problem delivering gcm message. issue occur few devices , few devices work fine in same network. have 1 htc , kitkat devices has issue when connect in wifi if mobile data turn on gcm message delivered. second 1 lenovo lollipop phone has problem when mobile data turn on if connect wifi gcm messages receives. last 2 days unable find out issue. there no wifi port block issue because 4 devices work fine on same wifi network , individual mobile data network. search stackoverflow questions.


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