My iPhone will not update. it keeps asking me to restore but then says there's an internal error -1. At first it wouldn't update saying there was no SIM Card. This was a used phone that i had the SIM Card replaced

Got a used iPhone4 to replace my lost one, had the screen replaced and then had the SIM card replaced by Best Buy.

They had issues in the store connecting to iTunes but the Geek Squad where they wiped it and said all was good.

Got home to update it and all was good up to the point where i needed to have the phone to work.

Then it wouldn't recognize there was a SIM card and to restore my phone.

it comes up now with unable to restore, unknown error -1

Help please