iPhone 1 Pro Max signal

The iPhone 1 came out 17 years ago. What do you expect, the phone is an antique.

Also, there was no such version as the iPhone 1 Pro Max, just iPhone 1.

• If you are using a case, try taking it off.
• For cellular performance, contact your cell provider where they can do remote diagnostics on the signal/noise ratio of your connection.
• Signal strength is dependent on how far away the tower it is connecting to, along with environmental interference.
• There is no standardized measurement of bars on a device, so you cannot compare bars from one device manufacturer to another.