What SIP Phones can I use with 3CX Phone System?

SIP Phone Configuration Guides 

• 3CX VOIP Client (Recommended)
• Aastra 51i (Recommended)
• Aastra 5xi (Recommended)
• Aastra 5xi (Using auto-provisioning)
• Linksys SPA-901 (Recommended)
• Linksys SPA-921/941 (Recommended)
• Linksys SPA-9XX (Using auto-provisioning)
• Polycom SoundPoint IP 301, 320,330,401,501,550 (Recommended)
• SNOM 300-320-360-370 (Recommended)
• SNOM M3 (Recommended)
• SNOM 300-320-360-370 (Using auto-provisioning)
• Aastra 9133i SIP and Aastra 480i
• CISCO 7940
• GrandStream GXP-2000
• GrandStream GXP-2000 and GXP-2020 (Using auto-provisioning)
• GrandStream HandyTone 286
• GrandStream HandyTone 386
• Nokia E65
• Siemens C470IP
• SJ phone
• X-Lite 3.0
• D-Link DPH-140S (Not Recommended)