The predecessor to the Realme C3 which has been found at $75 for the Optus version, but this is unlocked. It calls, texts, surfs the web and does everything you need+ more for $49, while packing a great battery size. At this price, you'd be stuck with feature phones or Optus branded phones, so this is likely better.
Specs:
6.1" HD+ Dewdrop screen
720 x 1560 resolution
MediaTek Helio P22
64GB storage
3GB RAM
MicroSD slot (up to 256GB)
5MP/f2.0 front camera
Dual rear cameras:
Main 13MP/f2.2
Secondary 2MP/f2.4
4000mAh battery
3.5mm headphone jack
Dual sim
Bluetooh 4.2
ColorOS V6.0.1 based on Android 9.0
Got one thanks. Good upgrade for my grandpa