Whatever phone you put the Sim in in the first place is locked to a particular network first of all, so the sim you have now won't work on it.
I got that before years ago, I'm pretty sure the sim went faulty , luckily I had contacts backed up on a sim card copier thing and exchanged them onto a new number/sim. Could be different situtation for you though.[/QUOTE
now you reminded me of something though
i did use a sim card reader on that card about a year ago, so hopefully those numbers are still in the reader
i will check it out tomorrow
might be saved