I really like what Brett Walker has to say here about phone numbers. Much clearer that I ever could. Maybe I get to emotionally attached to wanting to do what’s right for clients! I am not completely opposed to phone numbers. But usually I can’t answer the question “why should I phone?”. If you want me to come to your showroom… give me a reason to do that. If it solves a problem in my life I don’t need “more details”.
The Phone Number—Does it Work? from Soundscapes on Vimeo.
rushtononradio 
If you want to know how well telphone numbers work, the next time a client wants his in his ad, confirm he listens to your station, then ask him for any advertisers phone numbers he can remember. If the answer isn’t none, it’ll be for your only advertiser who sings his number ten times in a jingle.
Mike, I still remember “Travelline… 2 3 2 5, 3… 2… 5!”
After 20 years I still know a number to get travel information in Tyneside.
At least there was a PURPOSE and a REASON to remember that number.
As well as a catchy jingle!
The number justified is the exception.
“Come and try our new golden and delicious apple cider at the Apple Tree Pub, Hexham… for details call Hexham 2 4 5 7 8 9 0 4 7 3 8 0 5 3 5”