To access Aadhaar-related services online, it’s essential to have your mobile number linked to your Aadhaar.

A DUNS number can help establish business credit and may be required for certain state and local contracts, grants and loans.

A reference number is a unique identifier assigned to any financial transaction, including those made using a credit or debit card.

Although there is a mobile Gmail application available that allows most modern mobile phones to send and receive email messages, it is also possible to send email to a cell phone via your computer.

Credit cards with cell phone insurance can help if your mobile device is damaged or stolen. Multiple cards now offer it, and here are some of our top picks.