Why do phone numbers look corrupted?
Format the phone column as Text in Excel. Preserve the plus sign, country code and all digits, then upload again.
Format the phone column as Text in Excel. Preserve the plus sign, country code and all digits, then upload again. Confirm that preview has no scientific notation, missing digits or corrupted characters.
Before you start
- The time of the issue and affected record
- The exact on-screen error text
Step by step
Open Source file and Import preview
Go to Source file and Import preview from the main menu. Confirm that the selected record matches the task you are about to complete.
Why do phone numbers look corrupted?
Format the phone column as Text in Excel. Preserve the plus sign, country code and all digits, then upload again.
Check the result
Confirm that preview has no scientific notation, missing digits or corrupted characters.
Result checkIf it did not work
Check these
- If the screen or control is missing, check your user role and whether the feature is enabled for your account.
- If the action does not finish, send the exact on-screen error text to support.
Does this step look different in your panel?
We can review the screen and exact error text together.
This guide was checked against the product UI and code inventory on 29 August 2026.
