This makes the browser display a login prompt, but it doesnât display any other text thatâs in the response. (It only displays that response text if the user clicks âCancelâ.) When the user enters some credentials, the browser resubmits the same request to the same URL, plus it also adds this extra header: Authorization: Basic username:password. Note that the username:password bit is actually Base-64 encoded.
Sim card hold contacts, so pretty much everything will remain on your phone besides your contacs and your MEID which is your phone number.
An iPhone SIM card is a standard size card that looks similar to an SD card. When you subscribe to any GSM carrier, you will be provided with a SIM card that holds your cell phone information such as your phone number and can even store your contacts. In the US an iPhone data plan is required with any SIM card you get for the iPhone.