How do I update a contact's details everywhere I use that address book?
Quick answer
First identify which account or address book holds the contact you intend to change. Edit and save that record, then check the other apps where you use the contact. For Google Contacts on Android, Google says to open the contact, tap Edit, choose an account if prompted, make the change, and save. Google Account contacts sync with Google Contacts and Android devices, but this does not guarantee updates in every third-party app. [S1]
The question, the details, the next step.
I have the same person in my phone contacts, an email app, and maybe an old address book. What should I do first so I don't update the wrong copy?
List the places where you see the contact, then inspect the records before editing. Compare details you already know, such as the name and old phone number or email, and look for an account label or address-book name. Don’t assume the app you’re viewing holds the original record.
Choose the record you intend to maintain as the source of truth. For example, if you choose your personal Google Account, update that account’s contact rather than editing several similar-looking copies at once. On Android, Google’s instructions are to open the contact, tap Edit, choose an account if prompted, change the details, and save. Google Account contacts sync with Google Contacts and Android devices. [S1] This describes that Google workflow, not every phone, email app, or address book.
How can I tell which account a contact is stored in, and what if I see more than one copy?
Open the record and look for the app’s account or storage information. Labels and menus vary, so use the controls in the app you’re using rather than assuming there is one universal layout. In Google’s Android Contacts instructions, an account choice may appear while editing; check it before making a change. [S1]
If there are duplicates, compare them and note which account holds the record with details you trust. Avoid deleting or merging records just to tidy the list; those are separate changes from updating a detail. If you can’t tell which copy is authoritative, pause and confirm which account you intend to maintain. A simple note can help: “Person: [name]; intended account: [label]; field to change: [phone/email]; verified detail: [value].”
Once I've edited the source record, how do I check whether the other places I use it have changed too?
Save the source record, then check each destination app separately. Find the contact and compare the fields you changed, such as the phone number or email. Mark each place as updated, still showing the old value, or not checked. Treat a separate address book, local copy, or account as unknown until you inspect it.
Google says contacts saved to a Google Account sync with Google Contacts and Android devices. [S1] That does not establish that every third-party app or separate address book will update automatically. If another app still shows the old detail, first determine whether it displays a separate record or a view of the source. Update it only if it is meant to be maintained separately; otherwise, consult that app’s help.
Can you give me a simple reusable checklist, including what to do if I'm not sure whether an app changed?
Use this source-of-truth checklist:
- List the apps and address books where you use the contact.
- Inspect the record and identify its account or storage location.
- Choose the intended source record and verify the new detail before editing.
- Edit and save that record. For Google Contacts on Android, check the account if prompted. [S1]
- Reopen the source to confirm the saved field, then inspect each destination app you need.
- Mark each destination as updated, unchanged, or not checked. If uncertain, leave it unchecked until you inspect it.
Copyable tracker: Contact: [name] Source account/address book: [label] Field changed: [field] Destination app | Status | Note [app] | [updated / old value / not checked] | [observation]
This tracker records what you observe; it doesn’t guarantee that apps share data. The Google instructions establish syncing for Google Account contacts with Google Contacts and Android devices, not automatic updates in every third-party app or address book. [S1]
A practical checklist
List the apps and address books where you use the contact.
Inspect the record to identify its account or storage location.
Choose the intended source record and verify the new detail before editing.
Save the edit, checking the account if the app prompts you.
Check each destination app and record whether it updated, still shows the old value, or remains unchecked.
A few more useful answers
Does editing a contact in one app guarantee every other app will show the new details?
No. Google says Google Account contacts sync with Google Contacts and Android devices, but this does not establish automatic updates in every third-party app or separate address book. [S1]
What if I can't tell which copy is the source?
Pause before editing several copies. Check the account or storage label in each app and confirm which record you intend to maintain. If it remains unclear, verify which details are current before proceeding.
What should I do if another app still shows the old detail?
Record what you see, then determine whether the app shows a separate contact record or the source. Edit a separate copy only if it is meant to be maintained independently; otherwise, check that app’s help.
Sources
References used for this guide.
- [S1] Edit or delete contacts — Android phone & tablet — Contacts Help support.google.com · Checked