If you are willing to pay the phone bills on time to your phone service, then u can have you phone number forever.
如果你按时交电话费，你便可以永远拥有一个电话号码。

Having the same telephone number forever, you would be able to expect and wait for someone for life... If one day he suddenly remembers you, as long as he still has your number which you used to give him, he could still contact you with that number.
永远拥有一个电话号码,便可以一生守候一个人。如果有一天他忽然想起你，只要拨出你以前给他的电话号码，他就可以找到你。

Back then, no matter how bad the telephone reception was, or how expensive the bills were, you still refuse to change your phone service. You want to wait for a call which you probably won't ever recieve...
以前，即使电话接收有多差或服务费又多么昂贵，你还是不肯改用另一个电话网路商。你要等一个可能永远不会打来的电话。

People who retain the same number are mainly for convenience. But you retained the same number just because of a little hope. You haven't heard from him for years, a telephone line is the last as well as the most uncertain hope.
别人保留电话号码是为了方便。而你却是为了一个希望。多年没有她的消息，一条电话线，是最后也是最渺茫的一个希望。

Just in case if there's one day, you happened to see him on the streets, you could tell him shyly, "My telephone number is still the same." If he remembers, he might call you. Then you would have the chance of continuing your story with him. If he has forgotten your number, it's time you should give him up.
万一有一天，你在街上碰到他，你可以含蓄的告诉他:“我的电话号码没有变。”如果他记得，他也许会打来。那么你们的故事或许会继续。如果他忘了你的电话号码，你也就该死心了。

We can't possess someone forever, but we can possess a telephone number forever.
我们无法永恒的拥有一个人，却可以永久的拥有一个电话号码。

Will you ever call? My number is the same as before, expecting and waiting to hear your voice...
你会打电话来吗？我的电话号码还是跟以前一样，永远守候着你的声音。