Under the iTunes in the Cloud section, click Manage Devices. (If you haven't associated any devices with your Apple ID, you won't see the Manage Devices section.) Information about each associated device appears. Next to each device, you can see when it associated with your Apple ID.
The real reason why the burp smells so badly is hydrogen sulfide (H2S). If you eat foods that have sulfur proteins in them then you may find yourself burping the H2S, which will smell like rotten eggs. The sulfur reducing microbes in the intestine digest the proteins and release the gas.
1 doctor agreed: See below: The odor of your burps depends primarily on what is in your stomach. If food sets there too long it can decompose to some degree. Smaller meals with lower fat content should help. Diarrhea has multiple causes including infection, ibs, celiac disease, medications and inflammatory bowel disease. ...Read more.