The Web is full of tips on how to hack into someone’s phone with just their number. They put these words simply to catch your attention and refocus on their flagship product. The latter, at the end of the day, does not allow hacking into someone’s phone with just a phone number.
Actually, you don’t need a phone number to hack into the phone. You need to hack the phone first and if you need a phone number, you’ll get it after cracking. This is where spy apps come in handy. They provide access to someone’s devices, track activities on them, and delivers this information to an online account previously created for the app’s customer.
Thus, to hack into someone’s phone, the phone number is useless. If the purpose is to hack the handset itself, do it with spyware, where the phone number is not required.