Fake phone numbers are an amazing opportunity to save the privacy.
There are situations where it would be so nice to have a temporary number just for verification proccesses.
Often it should work if you put in your real cell phone number.
Maybe in some situations the verification is not possible because of your number.
A way is to download an app on your cell-phone that gives you a brand new disposable number.
Alternatives to receive a second mobile phone number is TextFree.
Prepaid mobile phones are a good option as well for throwaway numbers.
Free apps for iPhone and Android that give you a second phone number
TextNow, DingTone, TalkU, Telos, NextPlus and TextFree
Websites with public phone numbers (only for receiving voice mails and SMS)
SMS-Online.co, Receive-SMS-Online.info, ReceiveSMS.co, SMSReceiveFree.net, h3x.com and freephonenum.com