you probably do not have the correct phone or plan
You can receive text messages on a landline phone, but you cannot send them.
no, airplane mode cuts you off from service, and you need service to receive text messages.
It could be the Sprint customer has shut off the ability to receive text messages.
You would have to load a custom ringtone and associate it with messages.
Yes.
Yes it can and if you open it and read it you get charged for it unless it was set by your cell phone carrier. If you do not want to receive text messages on your phn then you can call your carrier and have them blocked so you can't receive or send messages...just remember to get it unblocked if you add texting later.
changing the phone#
You can still text them but their texts don't get through to your phone.
That sounds like a glitch in the system of your mobile phone provider.
Yes.
Yes u can read txt messeges
Most land line phones are not designed to send or receive text messages.