When you get a new iPhone or reset your current one, you’ll likely restore data from a backup file stored in iCloud. While this is a convenient method for iPhone users, the process sometimes gets stuck displaying "Calculating Remaining Time" without completing. To troubleshoot smoothly, let’s explore possible causes and solutions.
Why does the iCloud backup restore get stuck showing "Calculating Remaining Time"?
If the connected Wi-Fi network lacks sufficient speed, the iCloud-to-iPhone backup restore may stall.
An excessively large backup file may overwhelm the required bandwidth or the iPhone’s available storage.
Restoring to an iPhone requires enough free space to accommodate the backup file. Inadequate storage can hinder the process.
Is your iPhone’s iOS up to date? Older versions may be incompatible and cause various issues.
Verify the speed of your iPhone’s Wi-Fi connection using apps or browser-based speed tests.
On your iPhone, go to *Settings* > [Your Name] > *iCloud* > *Manage Storage* > *iCloud Storage* > [Your Device Name]. Review the next backup size and app data to ensure it’s not oversized.
Navigate to *Settings* > *General* > *Software Update* and install any available new versions.
For those frustrated by slow iCloud restores or hesitant due to missing time estimates, we recommend *Tenorshare UltData* , a specialized iOS data recovery tool. It can restore from iCloud backups in minutes, selectively and without overwriting your iPhone.
Launch *UltData* and click *Recover Data from iCloud*.
Sign in to iCloud.
Select the data types to restore and click *Scan*.
Select items from the preview and click *Save*.
Typically, it takes 1–4 hours, but slow speeds or large data may extend this to 10+ hours.
If "Restoration Paused" appears, your iPhone may have overheated. Wait for it to cool down, and the process will resume automatically.
We’ve explained why iCloud backup restores may stall at "Calculating Remaining Time" and how to fix it. Note that iCloud restores generally take hours, so plan accordingly. For time-sensitive cases, *UltData* offers a faster alternative. Its selective recovery feature also avoids full iPhone resetting.
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