What to do if your new iPhone's software update is stuck during data transfer
▼Click here for the full video on how to transfer data
• 【超詳しく解説】iPhone機種変更データ移行 2025 完全ガイド
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📝Contents of this video
0:00 Software update on new iPhone won't proceed
1:30 First, return to the original screen
1:55 If you can't return, restart
3:16 Force restart if frozen
3:53 Set up your new iPhone
8:07 Update your new iPhone
10:40 Reset your new iPhone
11:26 Restart Quick Start after updating
Reference: How to force restart
If your iPhone won't turn on or freezes - Apple Support (Japan)
https://support.apple.com/ja-jp/HT201412