CAN I USE MY IPAD PRO 12.9 FOR E SIM

Yes, if your iPad is equipped with an eSIM, an iPad can access Cellular data independently of an iPhone.

However - an iPad, whether a Cellular model or not, is not capable of directly accessing Cellular Voice or SMS/MMS Messaging features. An iPad with Cellular connection can only access cellular data; it is not a substitute for a mobile phone.

An iPad with either WiFi or Cellular connectivity alone can only access IP-data services. If you have added a DataSIM or iSIM and Cellular plan to a WiFi+Cellular model of iPad, the number associated with the SIM card is only used to identify your account for billing purposes. This number is not used for making calls or sending messages.

To be clear, a WiFi+Cellular iPad can not use cellular calling, or use SMS/MMS text, using just an iPad.

If you have added a DataSIM or eSIM, the iPad can only directly access cellular data - and not Cellular voice calling or SMS/MMS text messaging.

If you also have an iPhone, and both iPad and iPhone are using the same AppleID - only then can iPad access cellular calling and text messing via the iPhone.

Without the aid of an iPhone, whether the iPad is WiFi Only or WiFi+Cellular, an iPad can only natively exchange messages with other Apple devices using Apple’s proprietary iMessage service.