Iphone 4
Disconnect the contact for both the volume control cable and the standby cable. Loosen them very carefully within the order shown below. To do this, gently go underneath the contact with the pointed facet of the spudger and raise it up. When you have succeeded and the show could be lifted a little bit, work your way rigorously on the skin till the two long sides are loosened .
First remove the 2 Phillips screws from the silver cover . The silver cowl is fastened with five Phillips screws. Remove them and place the screws in a single part of the magnetic pad. To do that, use the sharp finish of the ESD spudger – go very gently underneath the plug .
Step 9
A suction cup is perfect for lifting clean surfaces corresponding to shows or rear glass panels. You need a flat plastic prying device to disconnect the various plugs and connectors. We suggest storing your screws so that you don’t combine up the various screws and small elements.
Flip the iPhone back over and insert a plastic card between the case facet of the battery and the rear case. If any of the adhesive strips broke off and the battery remains stuck to the rear case, put together an iOpener or use a hair dryer to heat the rear case directly behind the battery. The strip will stretch to many instances its original length. Continue pulling, re-grabbing the strip near the battery if necessary, until the complete strip comes free. Be cautious to not snag it on the nook of the battery or on any of the opposite inside iPhone parts.
Step 1
When reassembling, orient the plate with the small tab to the proper and the longest flat edge in opposition to the top of the telephone. Use a plastic opening software to raise the logic board up enough to grab with your fingers. Be cautious to not over-tighten the screws, and do not drive them.
However, the 800 MHz band is a subset of the 850 MHz band, which in all probability explains why the system was marketed as quad-band. The chip-sets had been manufactured by Skyworks Solutions and Infineon for GSM model. Manufacturers usually counsel their phones are higher than these of a competitor by highlighting “key performance indicators” — what they consider important technical specs. Such tech specs include digicam decision , however not antenna efficiency. A consequence of poor antenna performance is that when customers are unhappy with their cellphone signal, they blame the cell network operator.