I am having a problem with my Nokia phone on PLus netwrok (they use t -mobile I think.)
For sometime (first happened in April) certain messages are pending and no report is sent to me say not sent despite me having set to get delivery reports.
Now it is getting worse and no messages are sending (since 19th August)
I have been through all settings with the phone company twice.
It is nothing to do with other numbers as there are so many and their phones are turned on and not full and getting all other messages fine.

I am really fed up but reluctant to change networks as I don't use the phone much and have had the same number for years.
Please HELP!!!!!