No Service on my new iPhone

[appppppple]

Hi,

I just purchase a used iPhone XS Max yesterday. It is an unlocked phone, but when I put my Public Mobile SIM card in the new phone, I can't get any service. 

I can get service when I put the SIM card back into my old phone.  HELP!

[appppppple]

I have tried all these. Doesn't really do anything here. I know the phone recognizes the SIM card because I can go into the Network Selection and turn off the 'automatic' tab and find Public Mobile there. 

[appppppple]

I have tried that. I know the phone can recognize the SIM card for sure, but just no service. 

[JK8]

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@appppppple wrote:

Hi,

I just purchase a used iPhone XS Max yesterday. It is an unlocked phone, but when I put my Public Mobile SIM card in the new phone, I can't get any service. 

I can get service when I put the SIM card back into my old phone.  HELP!

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Try reinserting your SIM card again and reboot. It must be a phone issue since your sim works in other phones.

[Anonymous]

@appppppple 

do one thing Make sure your phone is off before removing your SIM card,

and take your SIM card out and waiting for a 2 minute and put it back and turn on -This one is quick and simple.

what is mean for Rebooting the phone means to turn off your phone and turn it back on again.

or can you do try reseat the SIM card

1. power off your device

2. take out the SIM card,

3. wipe it clean SIM card,

4. put it back and power on,

5. toggling airplane mode off/on,  

and do again Rebooting your phone means to turn off your phone and turn it back on again.

How to reset network settings on an IPhone

Go to Settings > General > Reset > Reset Network Settings.

This also resets Wi-Fi networks and passwords,

or visit  Here link, 

and go Changing APN Settings On An IPhone

click Here link,