A renewed version of Siemens S45. Such feature as e-mail client was added, besides the phone has two new colours. Siemens S45i suports GPRS class 8 instead of GPRS class 4. Innovations of the new phone are marked by blue colour.

• General features
  • Announced in: March 2002
  • eGSM900/GSM1800
  • Battery type: Li-Ion 840 mAh
  • Autonomy:
    • Standby time: 60-170 hours
    • Talk time: up to 60-240 minutes
    • Re-charging time: about 2 hours
  • High-contrast graphical display with the resolution of 101x80 pixels, with orange backlighting. It contains up to 7 text lines (up to 16 characters each)
  • Available colours: Titan Silver and Royal Champagne
  • Weight: 93 g.

• Memory
  • Phonebok: up to 500 phone numbers+ SIM-card memory. Up to 14 fields can be added to one name.
  • Lists of the last calls:
    • 10 dialed numbers
    • 10 received numbers
    • 10 missed numbers with time indication
  • Organiser memory: for up to 50 events
  • Memory, which can be used to store received messages and graphics - about 400 Kb

• Ringing tones, call management

• Vibrating alert
• 38 ringing tones + a possibility to record up to 4 own melodies
• Programmable incoming melody
• Speed dialing: for up to 8 phone numbers
• Minute minder
• Autodialing
• EFR, FR, HR
• User's profiles
• Voice dialing: (up to 20 voice tags)
• Voice commands (up to 10 voice tags)
• User's profiles

• SMS
  • EMS
  • Concatenated messages (up to 760 characters)
  • Predictive text input T9 (English)
  • Templates
  • Chat

• Connectivity
• WAP 1.2.1
• GPRS (class 8)
• Fax-modem, 9.6 kbps
• IrDa
• A possibility to edit phonebook and SMS-messages on PC
• E-mail client
• Synchronization with Microsoft Outlook
• SyncML

• Organiser and extras
  • Voice memo: up to 3 minutes, a possibility to keep these records on PC
  • Time and date, alarm-clock, stop-watch
  • Calculator, currency converter
  • Organiser with different types of events, totally up to 50 events
  • Games - Baloon Shooter, Stack Attack, Kung-fu (SMS game), RaceAce