Nexotek NT-P100M - Manual (Page 27)

CHAPTER 5: TROUBLESHOOTING 24
2. In the Options window, choose Sound Devices on the left side. Where you
see Audio In, Audio Out, and Ringing, change the setting to USB
Audio Device. Then click the Save button. The problem should now be
solved.
Can I use the phone with multiple Skype accounts?
Yes, you can. Your phone’s flash drive is equipped to store information for multiple
accounts. Just sign in with other Skype user names, and the account information will be
stored automatically.