Telstra is giving away new smartphones for people stuck with devices that lack 3G 850mhz on Telstra prepaid.
In March 2019, Telstra is refarming the 2100mhz band to 4G. Hence, if your phone is outdated enough, Telstra will give you a new Essential Plus and SIM for free.
Many Optus and Vodafone locked phones are 2100mhz/900mhz 3G only, so it might pay off to put your Telstra SIM into that and see if it triggers the offer.
Telstra's website seems to be smart enough realise I have a Nokia 8 with 3G 850mhz, so no freebie for me :(.
Edit: I got a shipping confirmation email from Telstra despite not having an eligible phone, thanks to realfancyman's hack (see below)
Incomplete list of eligible phones for the free Telstra upgrade
I have a Pre-Paid service: Please complete the web form here so we have your most current details. A care pack will be posted to you within 14 days, otherwise you can call 1800 112 722 (available 24 hours a day, 7 days a week), or visit a Telstra store to find suitable replacements.
What is the device included in the care pack?
A 4G capable Telstra Essential plus Smartphone will be provided
edit, realfancyman might have a way around this website
Was a bit suspicious that the website went to the "ineligible" panel so quickly, so I had a look at the Network Tools to see if the input was actually submitted - and it wasn't. Turning off javascript and using "document.getElementsByName("CustomerSurveyForm")[0].submit();" in console to submit the form gets me this response:
Thank you. Your order has been submitted.
Targeted offer. No use without the SMS.