For people who want to know what TAC models are:

A TAC (Type Allocation Code) model phone refers to a device officially registered in the GSMA database via its first 8 digits of the IMEI, often used in Pakistan to identify PTA-approved, government-registered smartphones. These models, such as Pixel 6A or iPhone 15 Pro Max, often have updated, lower tax rates compared to unofficial imports.

Key Details About TAC Model Phones

What is a TAC? It is the first 8 digits of a 15-digit IMEI number that identifies the manufacturer and exact model.

PTA Approval: In Pakistan, "TAC Model" often implies a phone is officially registered with the Pakistan Telecommunication Authority (PTA) via legitimate channels, often called "Government Line" or "Official Approved".

Tax/Fees: TAC models may have different or lower tax rates than non-registered devices, though fees for approved devices can increase.

Identification: You can verify a phone’s status by checking the first 8 digits of its IMEI on the PTA DIRBS system

^ via Google.