--reporter pkg-as follows --you've ppobably heard the rumor by now.the upccming i-phone 5 is supppsed to be thinner, lighter and faster.but it may have another interesting feature -- it could help boost the nation's g-d-p. j-p morgan says the new i-phone -- expected to be unveiled wednesday -- could give the economy a bump somewhere between a uarter to a half f a percentage point. government data shows the economy grew 1 point 7 percent in the second quarter -- so a boost from the i-phone could push growth to 2--percent in the fourth quarter. in doolars and cents, that's an additional 3-point-2 billion dollars being injected into when we really need it.to get that number -- j-p morgan predicts each i-phone would add $400 ddllars to g-d-p -- factoring in import costs... and assuming apple sells 8 millionni-phones in thh final three months of the year. that's actually a fairly low estimate considering the company sold 26-million i-phones last quurter.and that's a small number by apple's standards. so no surprisee the tech industry is estimattng a bigger sales number.it projects apple wa