Some browsers include an identifier in the Useragent string which tells us the model of the device that is being used. Below is a list of 32 unique device identifiers collected by WhichBrowser.
YL-Coolpad_D508/03.17.D510 | Coolpad | D508 | 
YL-COOLPAD_E600/10.14.E600 | Coolpad | E600 | 
HS-E316/E464.6.01.03.00 | Hisense | E316 | 
HW-HUAWEI_U2801 | Huawei | U2801 | 
HW-HUAWEI_U5200/ | Huawei | U5200 | 
S2151 | Kyocera | Coast S2151 | 
S2151-PLB | Kyocera | Coast S2151 | 
E4255 | Kyocera | DuraMax E4255 | 
VX11000 | LG | Env Touch | 
VX9200 | LG | Env3 | 
LG VN360 | LG | Exalt | 
VN271 | LG | Extravert | 
LG VN280 | LG | Extravert 2 | 
VN530 | LG | Octane | 
LG272 | LG | Rumor Reflex | 
LG510 | LG | Rumor Touch | 
LN510 | LG | Rumor Touch | 
CDM8999 | Pantech | Crux | 
CDM8992 | Pantech | Hotshot | 
TXT8045 | Pantech | Jest 2 | 
P6030 | Pantech | Reneu | 
SCH-U380 | Samsung | Brightside | 
M550 | Samsung | Exclaim | 
SCH-U485 | Samsung | Intensity III | 
SCH-U820 | Samsung | Reality | 
SCH-B309I/B309IGC14 | Samsung | SCH-B309 | 
SCH-F839/F839CH07 | Samsung | SCH-F839 | 
SCH-F839/F839DA15 | Samsung | SCH-F839 | 
SCH-S559/S559DL12 | Samsung | SCH-S559 | 
SCH-S579/S579DJ19 | Samsung | SCH-S579 | 
SCH-W709/1.0 | Samsung | SCH-W709 | 
SCP6780 | Sanyo | Innuendo |