You don't want to act too quickly or you come across as desperate.It's best to get to know a girl a little before asking for her number.The main reason why getting a girl on a phone call as quickly as possible is so important, is because a lot of guys can mess things up with her via a text message and blow their chances before they’ve even gotten her out on a date. He will then text her and say things like, “Hi Susan. He’s coming across as a lying, fake nice guy who is pretending as though he’s not even interested in sex.He just wants to start with a friendship and then hopefully get into a relationship with her.As a general guide, if you have exchanged multiple messages and are getting on well, it's the right time to take the next step. If she responds saying she's free, ask her if she fancies a coffee.If a girl has been giving you mixed signals online, such as appearing really keen then failing to respond to your messages for a couple of days, it makes sense to find out how interested she is before asking for her number. If she says yes, the next step -- exchanging numbers -- should come naturally. A more subtle approach is to ask her how she's finding the online dating experience.
When you text her, you are simply reminding her of the connection you had, and if you managed to make her feel attracted to you when you first met her, she will be excited to see that you are interested in her and are not messing her around like other guys do.When she asks you the same question, say something like "I enjoy it, and I'm really pleased to have met you.