yes
All communication can be used in court. But as with all communication it will be viewed with scepticism based on how provable the source is.
I would imagine since texts and pic messages are saved into the phone not the phone provider. I would imagine since texts and pic messages are saved into the phone not the phone provider.
No your messages are not deleted. when a phone is deactivated, it just means the service for the phone is turned off. everything that was saved in the phone, text messages, pictures, contacts, will still be there.
Text messages can be stored on the SIM card and/or on the phone, depending on the type of phone.
One's experience on sending and reading mobile phone text messages would probably including writing the messages using a keyboard located on the phone. One would also read the messages via the phone's screen.
If your phone is a GSM phone, then it would not take messages without a SIM card on the phone. It would not even work without it.
Cell phone. A type writer is for writing letters, not sending messages.
No.
No
Subject to discovery rules in your jurisdiction (and such rules are usually liberally construed) and the continued existence of the messages somewhere, either on a phone or in the files/records of the text message service provider, if the other side wants to spend the money to acquire them, past (not passed) text messages can be accessed and read.
Yes they can. all text messages are stored on the phone company's computers - before they're sent to the phone itself. Phone companies are required to keep text messages for a period (in the UK it's three years). Retrieval of old messages can only be done via a court order.
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