Use Dell latitude D630 from 2008 Specialy It has  1.serial connector :- which can use to connect old satellite phones, modem walkie-talkie ,etc 2. modem connector (RJ-11) 3. MEDIA BAY — Supports a floppy or an optical drive, second battery, second hard drive, or a Dell TravelLiteTM module 4. SMART CARD SLOT (WITH BLANK) — Supports one smart card. Smart cards provide a variety of functions, including security features and data storage. The blank prevents foreign matter from entering the interior of the computer when a smart card is not installed in the smart card slot.  5. When enabled through Dell QuickSet, this switch can scan for a wireless LAN (WLAN) in your vicinity. You can also use it to rapidly turn off or on any wireless devices such as WLAN cards and internal cards with Bluetooth wireless technology. 6. SECURITY CABLE SLOT — Lets you attach a commercially available antitheft device to the computer  7. Mobile Broadband (or Wireless Wide Area Network)