How to remote power on pc that it is not connected to a lan? It is only connected via usb or PCMCIA with a modem umts/hsdpa.
There's some good comments about this. One other option has sprung to mind which may be relevant if you don't need the wake up to happen automatically AND if you can connect to the LAN port on the PC AND it supports wake on LAN. I was thinking you could connect your PC to a router that supports a wifi dongle and has wake on LAN in its feature set - for example, the Draytek 2820 has a WOL page. If you setup the router with a dynamic name service, like DYNDNS, you could almost always connect to the router's Web interface and use the WOL page.