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Android icons
Close, voip
DarkGray
72x72
cancel, voip
voip, pencil
Gray
Clock, voip
cross, voip
voip, zoom
right, voip
iPhone Icons
voip
Black
40x40
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Icons8 — ever-growing set of Windows 8 (Metro style) icons
Gateway, voip
DarkSlateGray
26x26
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Web Cartoon
48x48
Comfi Telecom
SkyBlue
32x32
Sleek XP: Software
Tel, totaltalk, phone
Orange
300x300
Token
256x256
Alt, voip
Token Dark
voip, Alt
Token Light
Buuf
voip, how, don
Silver
128x128
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Social media
Glyph
Logo's pack collection
smartphone, Call, media
512x512
Signs & symbols
Smooth
Social Flat Buttons
voip, phone, smartphone
SlateGray
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Flat
Intercircles - Social Media Interaction Circles
Skype, voip
DodgerBlue
Hexagon Social media
Call, voip, Skype
DarkTurquoise
iOS7 optimized
Outline
Rcons Social
Skype, Logo, Call