Bring domestic mobile phones to Australia. Replaced it with hellomobile's sim card. Can't send text messages and can't access the Internet. Ask for help.

I estimate that the problem with text messages is due to the following reasons:

1. There is a problem with SMS activation on the SIM card. Does the SIM card you bought have SMS enabled (within Australia)? Does it support overseas SMS?

2. If there is no problem with 1, check the SMS center settings. If the settings are wrong and it cannot be sent (do not set it to a domestic SMS center, it will never be sent), you can ask Call the tour guide or hellomobile service hotline (the website is also available)

Internet problems:

The phone needs to be reset. Your phone is set according to domestic conditions (these settings are stored in the phone ), so you definitely can’t access the Internet. You need to consult your tour guide (local friend) or hellomobile’s service hotline