Turn contacts off and select keep on my iphone. When you power on your new iphone it will be using your mobile phone number and any other information you have saved to the sim card.
Just operate as below to find old contacts on iphone.
How to get an old number back on iphone. If you constantly update your backup to itunes and icloud you can retrieve your old call history from iphone without any hassles. Getting back iphone number from itunes backup. When itunes detects your iphone it will display it as device icon in the upper left corner of the window.
With the sim card in the new sim tray you can now place the tray back in the new iphone. Itunes stores backups on mac or pc to keep your data secure as long as you have your pc or mac at hand. We all know that backing up iphone to itunes can store your iphone data.
Decipher backup browser will show you the number email address even if there s no entry in your contacts. Here you can backup your iphone data including notes call log or any other important data. Press down to lock it in place.
Place the new iphone sim tray back in the phone. At the top of the next screen the first line will be my number the number on that line is. The recents list goes back in time quite a while my current backup made in 2017 has some entries from 2013 and 2014.
Click it then click summary tab form the left list. Turn contacts on and select merge. Indeed if you change the number to something else it should revert to the old number so that it matches the sim.
We can use that to look for old numbers and dates times you sent a message out to them to help us find the number. You can find your deleted contacts from itunes backup if you have made any backup for your iphone. Basically connect either to itunes or icloud log in and restore the iphone call log from the backup.
The number listed in settings should match the number on your sim. Plug iphone to a computer then launch itunes if does not open automatically. Wait a little while and you should see the deleted contacts back on your iphone.
To find the number on your iphone tap the settings icon and scroll down to the phone tab and tap it.