Phone not allowed

Hello good day my Asus Zenfone 4 Max are having issues regarding to receiving/sending messenges and receiving incoming and making outgoing calls. It always says that my mobile networking isn't working. Please help..
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Hi missindigo7287
Thank you for your asking. Kindly provide the information below so that we can better assist you.
1. Does the issue appear right after any system/apps' download or update?
2. Your current firmware version
Settings>System>About Phone>Software information
3. Does the issue remain with other SIM cards?
4. Which SIM carrier are you using?