My speaker are not working?

Your serial number is all that is required to complete the replacement.

To activate the handset, you will need to enter a SIM PIN - Not all Sim cards have pin numbers.

If you have a handset that does not utilise a SIM, then you will have no issue.

I would recommend backing up to iTunes before replacement, so you can restore your content.

hey if you're having a problem with the speaker, clean out the dirt with an old trading card, i.e. a digimon/pokemon card. and if it still doesnt work, probably the dock is jacked up.

So what is wrong with the phone if no slider bar is present as a handset, but is present when plugged into headphones or a jack of some sort???

You might try connecting to a bluetooth speaker or earphone, then disconnect the bluetooth connection. I've had this work on a couple of iOS devices. I know this is an old post, but probably still appropriate today. No OS is perfect. [I've made this post a couple of places on this site]