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L'Apple iPhone 5s è stato presentato il 10 settembre 2013. La riparazione di questo dispositivo è simile a quella dei modelli precedenti e richiede cacciaviti e strumenti di apertura. Disponibile nelle versioni GSM o CDMA con capacità di 16 , 32 o 64 GB nei colori Argento, Oro e Grigio Siderale.

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iPhone 5S - restore error code -1 after replacing battery

Hi. I’ve recently replaced my iPhone 5S’s battery, which was an arduous process because it turns out my battery was forming lumps. In the end, I got it out, replaced it, and closed up the iPhone again. Upon trying to restore it (it had gone into a boot loop before and gotten stuck in the DFU Screen) iTunes gave me the dreaded error code -1. Now it keeps going to the ‘plug into iTunes’ screen with the lightning connector, so I can’t get into DFU either.

From what I understand, this is indicative of a hardware error. An earlier thread I found whilst troubleshooting mentioned that it’s likely this is a defect in the baseband chip; I guess it’s possible I somehow scratched it. My questions therefore are:

  1. It’s possible the antenna is not connected properly. I had a lot of trouble connecting it, as earlier in the year I had replaced my lightning port (I think a faulty charger is what caused the battery issues in the first place) and the ifixit port’s antenna refused to snugly fit into the antenna’s port. After about two hours of fiddling I managed to get the antenna in the correct position, and relied upon the casing to keep it there. This time, I was a bit exasperated and didn’t spend the two hours again, and as a result it is possible the antenna isn’t in the correct position. Would it be possible that this is the problem? I don’t really know what the antenna is, and why it’s at the same place as the lightning port, so I’m not sure if it’s meant to have something to do with the restore process.
  2. A previous thread (iPhone could not be restored unknown error 1 ) seemed to have a variety of People posting success with heating or cooling their phones. The error posted there was code 1, not sure if that’s different from -1. I’m a bit worried I’ll break whatever isn’t broken on my phone right now if I do so, so could someone tell me whether or not this is a terrible idea as a last resort?

In case it’s not apparent, I don’t have warranty, so no free apple care even if I hadn’t replaced my port and battery.

Any other advice would also be highly appreciated.

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Do you perhaps have any suggestions on keeping the antenna in place instead of relying on the metal case? It won't stay in the socket whatever I do, and I don't really see a place an adhesive would be safe to use at.

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The antenna near the Lightning port is the cellular antenna. If it's not seated properly and/or is damaged, your iPhone won't be able to communicate with the cellular network (or will have a weaker-than-normal signal). Using the case to hold it in place is asking for problems. By itself, a disconnected cellular cable won't cause the error you're experiencing now but if it's not where it should be it can easily create a short amongst nearby components.

The -1 error is most commonly (in my experienced) caused by an issue with the baseband chip. In many cases (again, in my experience) reflowing the chip solved the problem but it's not a simple operation or for the faint of heart. In those cases where a reflow didn't help, replacing the baseband chip is the fix. Again, not a simple operation. It is absolutely possible to destroy your phone if this is done wrong. You may want to find a local microsoldering service shop in your area and have them do it.

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The antenna wire is held in place with friction. Assuming nothing is damaged (and those connectors are *really* easy to damage), once you get it aligned you just press it down to lock into place, like an old-school composite video or audio cable. Gluing the cable into place won't establish the electrical connection that needs to happen for the antenna to work.

If yours isn't staying in the socket then the first thing to do is to examine both the socket and the cable end for damage. It is insanely easy to damage these connectors; you need only have it misaligned by a millimeter and then push down with sufficient force to damage either or both sides. The top of this image shows what a good socket and cable end should look like (sockets on either side, cable in the middle):

https://www.smartfonefix.co.uk/user/SFAN...

If yours don't look like that then they will need to be repaired (sockets) or replaced (cable).

If they DO look like that then your problem is likely that you don't have it aligned properly. It needs to be EXACTLY dead-on before you press it into place. When you've got it right, it will feel like a 3.5mm headphone jack clicking into place (but a lot smaller).

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