iPhone has numbers in parenthesis after it in finder

The device name will increment if you have several of the same devices to distinguish them from one another. I've heard that the incrementing issue is somewhat related to the router, especially if you have several networks, but an official fix is yet to be issued. For now, uniquely changing the device name should stop any incrementing.

To change your iPhone name-

1. Go to Settings > General > About > Name.
2. Tap the X, enter a new name, then tap Done.

Hope that helped!

Try giving it a unique name (or maybe just changing it back to 'iPhone'). That should stop the device name incrementing.

It would be better if you can please re-post with a screenshot, in order to understand the phenomenon better. Images/pictures speak louder than words. 

Please understand this is a public forum: While attaching a Screenshot, do not provide any personal credentials, such as IP address, Card detail, email id, apple id, IMEI number, Serial Number, Phone number, Order ID, if you are sharing a map ensure your location is not identifiable, etc.

I’m also having this issue. It was (4) a few days ago. Now it’s (34).

My phone keeps jumping up in numbers between the parenthesis. I know I haven’t had 153 iPhones 12’s, I’m not sure what’s causing this but it’s starting to get concerning

Why is 'it' incrementing in the first place? What is 'it' counting? Where do I go to change the name of my phone?.

Unlike some Android devices, contacts are neither stored locally on an iPhone nor in SIM. They are synced to an email account that you had Google, iCloud, AOL, Exchange, Outlook, Yahoo or any Other

If Contacts on iCloud, try this --> Restore contacts, calendars, bookmarks, and more using ...

Else Add the email account that stores your contacts in the IOS mail app and enable Contacts.If you have a corporate email account added through a profile on your device, please check with your organisation's system administrator.

Have you received an answer bc I’m looking for the same thing. TIA