See information about iPhone. Go to Settings > General > About. The items you can view include:
Number of songs, videos, photos, and applications
Capacity and available storage space
Wi-Fi and Bluetooth addresses
IMEI (International Mobile Equipment Identity)
ICCID (Integrated Circuit Card Identifier, or Smart Card) for GSM networks
MEID (Mobile Equipment Identifier) for CDMA networks
Diagnostics & Usage and Legal (including legal notices, license, warranty, regulatory marks and RF exposure information)
To copy the serial number and other identifiers, touch and hold the identifier until Copy appears.
To help Apple improve products and services, iPhone sends diagnostic and usage data. This data does not personally identify you, but may include location information.
View or turn off diagnostic information. Go to Settings > General > About > Diagnostics & Usage.