У вашего броузера проблема в совместимости с HTML5
Factory hard reset will reset your phone to factory settings. Hard reset will clear a forgotten pass code. The reset will remove all data, including photos, contacts, texts, etc. WILL NOT REMOVE APPLE ID - ICLOUD. Factory reset is done if you have access to the settings, and does the same thing. resets the phone to factory settings.
You can also try ReiBoot to reset Factory Reset iPhone 6s/ 6s plus, 6/6 plus/5/5c/5s.1 click only. Try it now: http://www.tenorshare.com/products/reiboot.html?utm_source=youtube&utm_medium=YIuvStoRyO4. Besides factory reset, ReiBoot also can
fix iPhone/iPad stuck in recovery mode/DFU mode/bootloop/White apple logo, etc.
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What is Activation Lock (apple lock/ iCloud lock)? https://www.youtube.com/watch?v=Un6862_lGsQ
Check Activation Lock (Apple / iCloud lock) status instructions: https://www.youtube.com/edit?o=U&video_id=KNyKMwNoqyw