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.
Sometimes though it has an extremely foul smell but the odor of the burp in these instances could be a symptom of certain digestive disorders and diseases. Sulfur (also spelled as sulphur) is often associated with a foul odor when it is mixed with other substances like hydrogen. With regards to sulfur burps, most of us understand it to mean rotten eggs. Hydrogen sulfide is the gas that is released from rotten eggs to give it the characteristic offensive odor, similar to stink bombs used in pranks and one of the components of flatus (âfartâ). While this offensive odor is not entirely unexpected with flatus, it is often a cause for concern when it is smelled in burps.