1.The device is designed to be used no matter when you need to track someone’s movements.
Whenever
2.No matter how rarely your PC is attacked by malware, you should always be running an antivirus program.
However
3.No matter who visits the website, he can download any e-book by creating an account in the first place.
Whoever
4.No matter which way you look at it, e-banking has become an important tool for hackers to steal data.
Whichever