• Sony Xperia ZL
• Sony Xperia ZR
• Spice MI-335 (Stellar Craze)
• Spice Stellar Nhance Mi-435
• Super LCD
• Superphone
• Symbian Foundation
• Comparison of Symbian devices
• Symbian

T

• T-Mobile myTouch 4G
• T-Mobile myTouch 4G Slide
• T-Mobile myTouch Q by LG and T-Mobile myTouch by LG
• T-Mobile Pulse
• Tizen
• Treo 600
• Treo 650
• Treo 680
• Treo 755p
• Trium Mondo

U

• Ubuntu Edge
• Ubuntu Touch
• UIQ

V

• Vertu Ti
• Verykool
• Vibo A688
• Videophone
• Videotelephony

W

• Walton Micro-Tech Corporation Ltd.
• WebOS
• Wickedleak Wammy Passion X
• Windows 10 Mobile
• Windows Mobile Smartphone
• Windows Phone
• Windows Phone 7
• Windows Phone 8.1
• Windows Phone version history

X

• X-Tel 7500
• X-Tel 9500
• XenMobile
• Xiaomi Mi 1
• Xiaomi Mi 2
• Xiaomi Mi 2A
• Xiaomi Mi 2S
• Xiaomi Mi 4c
• Xiaomi Mi 5
• Xiaomi Redmi 2
• Xiaomi Redmi 3
• Xiaomi redmi note 2 pro
• Xiaomi Redmi Note 3
• XL-Viewer 5000
• Xplore G18
• Xplore M98

Y

• Yu Yuphoria

Z

• ZTE Blade
• ZTE Open
• ZTE Tania