Locate the silver button on the back of the phone, near the bottom.

Press down the button with one hand whilst sliding the back cover of the phone away from the antenna.

The back cover should slide off easily.

Insert a plastic spudger near one corner of the battery (preferably one furthest from the phone's antenna).

With a firm grip, gently lift the end of your tool up. The battery should easily raise out of its place.

Now that the battery is exposed, use your fingers to remove the it from the phone.

Note the metal connections on the phone, which are now exposed with the battery removed.

There are corresponding metal connectors on the replacement battery.

When you install the battery, be sure both connectors are matched up. Otherwise, your battery will be unable to supply power to your phone.

Use Spudger to remove rubber plug from upper left corner of the back of the phone

Using a Hex T6 screwdriver, remove the 4 screws holding the back plate of the phone in place

There will be three tabs holding the back plastic plate in

To remove the back plate, pull the tabs towards the outside of the phone and lift the plate up simultaneously

Be careful when removing the back plate; don't put too much stress on the back plate or the plastic may snap

Remove the flex from the mother board using the Spudger

Be delicate while removing the ribbon cable because it is slightly fragile and it is necessary for the phone to function

Gently peel back the motherboard from the main part of the phone.