on 31-05-2020 11:31
on 31-05-2020 11:33
Try these tips here Guide: Text Message Tips (not sent or received)
on 31-05-2020 11:52
on 31-05-2020 12:52
on 31-05-2020 12:52
The message centre number is automatically set by the sim card.
You need to correct type for your account, ie, contract or PAYG.
Make sure you have the right sim first. If you've changed from one type of account without a new sim, that will be your problem.
On an iPhone, you also need to switch on "send as sms" in message settings.