Celreport is an application developed by Celfinet for iPhone that allows, in a easy way, to report georeferenced network incidents (such as dropped calls, failed data connection, etc.).
If your operator is using Celreport but your phone number is not considered, instead of the activation 4 digit code that you should receive by SMS after entering your phone number, you may receive the following notification: "This application is currently not available in your operator. Sorry for any inconvenience."
If your operator is not using Celreport, you can always download and register Celreport in your iPhone but the incidents you may report will be sent to the Celfinet back office environment, so do not expect any kind of technical feedback.
Celreport can also be installed on the iPad but it must be associated with a voice SIM card installed in a phone (activation code will be received on the phone).