Insert sd card

Solution
There are many ZTE phones so we can't say more without knowing the device. However, that said, your instruction manual should say where. Add to that the fact that most phones that accept a SD card will either have an external slot you can see, or a slot for it in with the battery.

If your phone doesn't have those, then it may well not allow for a card. Some don't. You can also try looking up the specs (specifications) for that device on google (you will need the full model info) and it can tell you if it allows for a card.
There are many ZTE phones so we can't say more without knowing the device. However, that said, your instruction manual should say where. Add to that the fact that most phones that accept a SD card will either have an external slot you can see, or a slot for it in with the battery.

If your phone doesn't have those, then it may well not allow for a card. Some don't. You can also try looking up the specs (specifications) for that device on google (you will need the full model info) and it can tell you if it allows for a card.
 
Solution