May be returned, the specific situation should be based on the portable wifi manufacturer's policy.
Because different manufacturers have different policies on returns, some manufacturers may provide different policies and standards for after-sales service.
If you signed a purchase agreement at the time of purchase and followed the return policy, you can return the product according to the regulations.
If there is no provision, you can consult the manufacturer's after-sales customer service whether you can return the product.
You should know the specific return policy before returning a product to avoid affecting returns and refunds. In addition, you should pay attention to the use of portable wifi, do not use excessive or damaged, otherwise it will affect returns and refunds.