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Postagem original de: tonyhamre ,

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ITunes error -1 is baseband firmware failure to load. It is the eeprom ic failing to communicate with the modem hardware issue 100% either cracked ball on the modem data line or damaged eeprom. You will have to take it to a capable technician with eeprom programming equipment.

When updating it is better to update over WiFi as this fault is a restore fault. It will not be prevalent until restore

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