ashfan

Absolutely right. I have managed it eventually and for what its worth these are my tips for getting it done. Its how I managed it anyway.
 
It did help to remove the trim surrounding the glass. I found that attaching the main trim to that first meant that I was fighting to attach the clips on the main trim.
 
I read somewhere that greasing the clips helped but I think it just helped them to pop out again when they were attached so I removed the grease..
 
Before you start make sure all the clips are in place on the trim tight and all pointing the right way. It took a lot of force to release them when removing the trim so a lot of them got bent or out of shape. If necessary get some new ones.
 
I was lucky in that I have a garage so I could open the tailgate against the open garage door (with plenty of padding of course) which gave me something to push against when I was trying to force the clips home, they are very tight.
 
I started at the wiper motor side and worked my way round, trying to do both sides  before the lock edge. It does help if you have a helper to hold it up whilst trying to line up the clips. I had two of those props that plasterers use to hold up plasterboard to a ceiling while its being nailed, they were a godsend and held the trim up nicely while I fiddled with the clips.
 
When it was all fixed in place I then had to release the two corners where I first started so that I could then attach the trim that surrounds the glass. That then went on easily but I couldn`t get the two plastic push in clips that hold the very tip of the glass surround trim but it all seems to be in nice and tight anyway.
 
Thats how I managed it anyway but I`m sure others have their own preferred method.

On my Galaxy S3 they are stored on my SIM card and to access them I need to go into the menu for the messaging page. hope that makes sense