angularjs - Angular.js JSONP callback request issue with Symfony2 -

my app has gone live reason worked fine during testing phase broke when published on google play.

i submitting information server eg. logging in through angular.js json requests used work now, getting invalid callback name error in vendor/symfony/symfony/src/symfony/component/httpfoundation/jsonresponse.php @ line 77.

the callback name not valid.  

the issue emanates callback string attached angular.js

&callback=angular.callbacks._0 

even though url constructed this:

url = servicebase + q + '?' + obj.serialize(object) + '&callback=json_callback'; 

this how handle response in symfony action

$response = new jsonresponse();     $response->setcallback($callback); $response->setdata($feedback); return $response; 

is there way remedied? tried looking around , googling there no definitive answer not hack. in advance, hope me before wakes , tries register or logs in