wow, i don't care who you are, or what you do, you cannot tell me that since the since the invention of the mobile phone you have been worried about it bending!? its such a none issue.
Things bend if you try to bend them - mobile phones will bend if you try to bend them and they will break, WOW someone stop the press, how did Newton not predict this!!?!?!
If you don't want a broken phone, don't try to bend it. and Normal use doesn't have to be defined, any human with sub average intelligence knows that if you use a phone properly, the chances of it bending are slim to none.