DATA USAGE INFO UNAVAILABLE AT THIS TIME.

Hi Granny888 

This message on devices and their webpage has been a regular feature from Telstra.

After a prolonged outage in 2018, I have noticed it as an ongoing recurrence mostly for a few hours overnight for years.

Telstra performed a "planned upgrade to our internal systems" around 25 March, which was severe enough to drop pre-paid accounts from the MyTelstra App and the Account Web Page. They are now back.

Unfortunately my device is still showing the 'Data usage info unavailable at this time" for a continuous period despite reboots. I personally will wait a fortnight before I go down the rabbit-hole of asking for Telstra Support.

Have you got a Telstra ID? If so you can sign in at https://www.telstra.com.au/ top right hand corner, which also gives you the option to create a Telstra ID.

With an ID, you can also use the MyTelstra app on a smartphone. The usage data is available for post-paid and pre-paid services.

It is a workaround but it may shed a little light.