Where is the SIMM
Looking foe the SIMM card, for removal.
There is no SIM card used in this phone.
The ZTE n817 is a CDMA type mobile phone not a GSM type mobile phone.
It can only be used with carriers that have a CDMA network, e.g. Sprint and Verizon
CDMA phones do not use a SIM card, whereas GSM phones do.
Here’s a link to the User manual which may be of some help.