lost iphone

You cannot.

Hello, my friend has lost an iPhone 4 today in Bratislava, Slovakia. We have already reported to the Slovakian Police. We have one problem about this issue, now we are in Austria and at the moment we don’t know IMEI, ICCID or Serial Number of the device, because the all documents of lost iPhone is in our home country and also we don’t remember on which ID the device is registered. Because of all this we cannot checkup the device with programs such as iCloud or Find My iPhone. Please provide the information on how can we find this iPhone, what measures we can use, what to do for the next step. Please confirm and reply as soon as possible.

YOU CANNOT. NO MATTER HOW LARGE YOUR MAKE YOUR FONT. YOUR PHONE IS GONE.