[EVO 4G Q&A, Help & Troubleshooting] John5788:
The phone does not appear in device manager for Windows, even as an unknown device.

When I plug it into my linux box at home, here is what dmesg reports

[347360.904264] hub 2-0:1.0: state 7 ports 6 chg 0000 evt 0020
[347360.904275] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001403 0 ACK POWER sig=k CSC CONNECT
[347360.904281] hub 2-0:1.0: port 5, status 0501, change 0001, 480 Mb/s
[347361.008173] hub 2-0:1.0: debounce: port 5: total 100ms stable 100ms status 0x501
[347361.008183] ehci_hcd 0000:00:1d.7: port 5 low speed --> companion
[347361.008203] usb usb8: wakeup_rh (auto-start)
[347361.059149] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 003002 0 ACK POWER OWNER sig=se0 CSC
[347361.059169] hub 8-0:1.0: state 7 ports 2 chg 0000 evt 0002
[347361.059176] uhci_hcd 0000:00:1d.2: port 1 portsc 01a3,00
[347361.059183] hub 8-0:1.0: port 1, status 0301, change 0001, 1.5 Mb/s
[347361.163091] hub 8-0:1.0: debounce: port 1: total 100ms stable 100ms status 0x301
[347361.214099] hub 8-0:1.0: unable to enumerate USB device on port 1
[347361.214107] hub 2-0:1.0: state 7 ports 6 chg 0000 evt 0020
[347361.215095] hub 2-0:1.0: state 7 ports 6 chg 0000 evt 0020
[347361.215102] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001403 0 ACK POWER sig=k CSC CONNECT
[347361.215109] hub 2-0:1.0: port 5, status 0501, change 0001, 480 Mb/s
[347361.241057] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001002 0 ACK POWER sig=se0 CSC
[347361.267058] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001402 0 ACK POWER sig=k CSC
[347361.293035] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001003 0 ACK POWER sig=se0 CSC CONNECT
[347361.319020] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001002 0 ACK POWER sig=se0 CSC
[347361.345004] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001402 0 ACK POWER sig=k CSC
[347361.370991] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001003 0 ACK POWER sig=se0 CSC CONNECT
[347361.396980] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001003 0 ACK POWER sig=se0 CSC CONNECT
[347361.422970] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001403 0 ACK POWER sig=k CSC CONNECT
[347361.448960] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001403 0 ACK POWER sig=k CSC CONNECT
[347361.474944] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001002 0 ACK POWER sig=se0 CSC
[347361.500931] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001403 0 ACK POWER sig=k CSC CONNECT
[347361.526923] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001002 0 ACK POWER sig=se0 CSC
[347361.552906] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001402 0 ACK POWER sig=k CSC
[347361.578899] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001402 0 ACK POWER sig=k CSC
[347361.604884] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001403 0 ACK POWER sig=k CSC CONNECT
[347361.630872] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001003 0 ACK POWER sig=se0 CSC CONNECT
[347361.656867] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001003 0 ACK POWER sig=se0 CSC CONNECT
[347361.682847] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001003 0 ACK POWER sig=se0 CSC CONNECT
[347361.708834] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001002 0 ACK POWER sig=se0 CSC
[347361.734831] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001403 0 ACK POWER sig=k CSC CONNECT
[347361.760807] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001402 0 ACK POWER sig=k CSC
[347361.786809] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001003 0 ACK POWER sig=se0 CSC CONNECT
[347361.812801] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001403 0 ACK POWER sig=k CSC CONNECT
[347361.838775] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001003 0 ACK POWER sig=se0 CSC CONNECT
[347361.864761] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001003 0 ACK POWER sig=se0 CSC CONNECT
[347361.890749] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001002 0 ACK POWER sig=se0 CSC
[347361.916737] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001002 0 ACK POWER sig=se0 CSC
[347361.942734] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001403 0 ACK POWER sig=k CSC CONNECT
[347361.968714] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001402 0 ACK POWER sig=k CSC
[347361.994700] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001003 0 ACK POWER sig=se0 CSC CONNECT
[347362.020689] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001403 0 ACK POWER sig=k CSC CONNECT
[347362.046672] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001403 0 ACK POWER sig=k CSC CONNECT
[347362.072659] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001003 0 ACK POWER sig=se0 CSC CONNECT
[347362.098650] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001403 0 ACK POWER sig=k CSC CONNECT
[347362.124650] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001002 0 ACK POWER sig=se0 CSC
[347362.150628] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001403 0 ACK POWER sig=k CSC CONNECT
[347362.176614] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001402 0 ACK POWER sig=k CSC
[347362.202603] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001002 0 ACK POWER sig=se0 CSC
[347362.306555] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001c03 0 ACK POWER sig=? CSC CONNECT
[347362.332542] ehci_hcd 0000:00:1d.7: GetStatus port:5 status 001002 0 ACK POWER sig=se0 CSC
[347362.406509] usb usb8: suspend_rh (auto-stop)
[347362.436686] hub 2-0:1.0: debounce: port 5: total 1175ms stable 100ms status 0x100
[347362.436694] hub 2-0:1.0: state 7 ports 6 chg 0000 evt 0020

It does not show up in my `lsusb` list either.