I have had many phones and new numbers compromised over the last four years with this number listed as SMSC on my phone.
After reading some of the comments here is this the government Telstra or just some dodgy people still continuing to disrupt my life and steal from me cause havoc for my life and future...

So did you get to the bottom of this as I have the same issue

Im not with Telstra. Why eould it tell me to delete old messages?

Class 0 message sms delete all stored msgs from your phone, About 30 times in the last two days, annoying

Caller: Bogus Telstra Support

I've been a victim of hacking for years... The group of 'man' (boys) abuse every single naive women and men from who they can threat, use, abuse, sell... and sadisticaly laugh at. Aaaand they don't think they are doing anything wrong afterall you are the 'dumbass' not realising they are doing it to you as they lack empathy, courage, balls, a heart... in a nutshell, they are so sh*tty that if they don't lie to get money and sex they wouldn't have anything in this life and they help each other because they don't even like themselves... most can't even be alone as they go straight into depression and suicidal ideation. Worse is that they unfortunately can't control themselves and consider that doing what they do makes them feel 'powerful'... not growing up, procrastinating, using and hurting people...
Today... I give up... the same way they don't see any sense in being humble, I can't make sense of why they would choose to acquire so many diseases (yes, living on a fight or flight state destroys them and although they consider themselves 'emotionless' they are more sensitive than the sensitive ppl they use and abuse... just touch their money, mess up their hair or make a comment on their stained, ridiculous clothes or the way they talk... haha... you'll witness an explosion... jk... really, don't do it or you'll have a vivid reminder of your high school worst bully).
Optus hacked? Telstra and Vodafone have been hacked years ago... wake up...

Received SMS "Delete ALL Stored messages from your phone!" 2x late last night then 1 early this morning.

i had this number listed in my phone as the message centre 0418 706 700 which i think is the 10 second message bull****. I have now taken that number out and replaced it with 101 and the messages now go to my message bank as they should have to start with!

Was set as my message centre number??

Msg received "Delete all stored messages from your phone".
Just delete it, I reckon it's a scam of some kind.

Phishing texts

Whatever effwit software it is that sent this message from this number back in 2014, is still sending it in 2020.

See also 0415 013 041, same message.

Also accompanied by multiple Class 0 messages that don't show up in the SMS list. I'm unimpressed.

Claimed to be from JB HiFi saying I only had today to claim a free reward, with a dodgy link to click on. Avoid like the plague.

Caller: 0418 706 700

Scam. Message from "Suncorp" wanting me to click a link so that I can login and keep using my online account.... Yeah right, I am not even a Suncorp customer!

131477 is your Shopify Pay code for MESHKI

Caller: Stfu

Everyone relax, its just being redirected to be copied to the central Aus meta-date centre.

Caller: 0418 706 700 texted me several times

texted me4x ,knew something about i need to finish registering in order to win etc etc and there was a website link, I deleted it then after an hour another one said they need a tester for terry white chemist in my area and I qualify.. its a scam do not click the link just block or delete it

Caller: This definitely a hacker

don’t know who these people are
They have been annoying me since 2013

This number is visible in the old 2g network message centre. If you’ve ever seen it, your calls & txt are being diverted, you can see there is a number renaming profile along side it..

It’s not renaming the number in the good old 2G network..
no reception but you can still see all message centre settings.

Caller: Unsolicited message

I received a message on this number with a link to a fake Westpac site, telling me to login to see if my account was locked. This is a scam.

Caller: Scam

Sending message about product testing and providing link. Beware Scam Scam Scam.
You can safe and blacklist the number

Scam. They got my number send me unsolicited messages with a link to click on it.