Zte T230 User Manual page 5

3. Expand the device memory with a microSD(HC) up to 32GB
(optional) by fitting it in the microSD card holder. See a tech bar
or salesman at Officeworks when you purchase the microSD card
to help fit the memory card. Or contact ZTE Australia with your
handset model via Facebook Message and we can provide a video
link of what to do.
4. The battery will only fit one way, just check the gold pads on the
battery line up with the gold springs in the phone.
5. Replace the battery cover and press to click into place.