Hi Toricarp19,
If you have transferred all of your data to your new iPhone and inserted the SIM card, but not receiving cellular data, see if the steps in Connect iPhone to the internet help:
"Connect iPhone to a cellular network
Your iPhone automatically connects to your carrierʼs cellular data network if a Wi-Fi network isnʼt available. If iPhone doesn’t connect, check the following:
- Verify that your SIM is activated and unlocked. See Set up cellular service on iPhone.
- Go to Settings > Cellular.
- Verify that Cellular Data is turned on. If you’re using Dual SIM, tap Cellular Data, then verify the selected line. (You can choose only one line for cellular data.)"
If it continues, contact your carrier for further assistance.
Take care.