Your iPhone is obviously more adversely affected than many others and Apple should replace your phone. You should be able to duplicate the problem very easily at an Apple store for a valid replacement.
That said I have the problem as well. I have to fully grip it with the fleshy part of my left hand under my thumb pressed tightly against the left antenna and my fingers touching the right antenna and then I lose cellular data and voice. HOWEVER, holding the phone in a normal manner with my right hand, I have NO problems. NO dropped calls, either, not a single one. I would guess my issue is more similar to the masses than your issue.
Again, yours is obviously worse than the rest and should definitely be replaced as defective. The iPhone 4 IS fit for purpose, your particular unit may not. Thanks for your generalization, though. Though I like my iPhone, I despise Apple, and I do agree the antenna was not designed as well as I would have liked. My phone does work though, so.....
There are people that do have the phone, and do experience the issues. They take them into the stores (this was a few days ago) and clearly demonstrate that something is going on, and the Apple Genius or whoever promptly offered replacements (I'm not citing specifics, I'm citing that this return-replace-whatever cycle has happened thousands of times in the past few days), and the customer was then rather shocked to find
the replacement phone suffered the same problems, sometimes slightly better, ofttimes exactly the same, and in some cases, the replacement offered worse performance and more noticeable issues.
The issue now, as of about Monday afternoon (here in the US, that is), Apple Stores aren't quite so accepting anymore because something changed which lends strong credibility to that Boy Genius Report leaked info (if it's accurate, and all signs point to that being a positive) that basically instructs Apple Support staff in the stores to not offer replacements, to charge restocking fees if the customer attempts to or forces the return of the phone outright, and other considerations.
The fact that on Sunday someone could return or exchange an iPhone 4 at an Apple Store in a few minutes without many hassles - or a restocking fee - showed one thing, now if you make the same attempt to replace or return the phone outright the Apple Store reps are basically going to say "No, but if you pay the restocking fee we'll issue you a refund for the difference."
I have 1 friend here in Vegas that returned - not for replacement, but for complete total refund of every penny he put into it at purchase last Friday - his iPhone 4 for the very same issues others have: reception problems, green tint on snapped photos, yellowish tint on the screen (didn't go away in 4+ days of use), and he could effectively kill his iPhone 4 with a fingertip the same way I can and do and continue to be able to do (info at the link in my sig) and they tried to hit him for the restocking fee.
He was standing there demonstrating the issues and they simply ignored him, didn't act interested, like they'd heard this a thousand times before (gee, I wonder why) and didn't want to help him at all. I stood beside him and just listened - I was going to record the whole event using my iPhone 4 since it does video pretty well but, I didn't want to get involved or potentially get thrown out of the store and cause my friend grief during his return process.
Basically they did eventually refund him the entire cost he put into the phone, transferred his service back to his iPhone 3GS (which he said he's going to sell now and get an Android based device, for the specific reason that he's sick of Apple's BS from Cupertino all the way to the Apple Store here in town and everything in between), and we left.
After we walked outside into the mall area (this is the Apple Store at the Fashion Show Mall here in Las Vegas), several people came up to us and asked if he got the refund - they'd been in the store and overheard/witnessed what was going on. He told them that yes he did get the refund, that he was never going to do business with Apple again, showed his 3GS and asked "Anyone want an iPhone 3GS that actually works, cheap?" and promptly sold it to one of them for $250 on the spot. We walked over to one of the eateries in the mall, got a seat, he yanked his SIM card out, reset the device to clear off his personal data and restore factory condition, and sold it right in front of me.
Then we went to the Sprint booth and he grabbed an HTC EVO, and in 20 minutes time he was up and running, with what he considers to be a superior device, and he had full 5 bars of signal no matter where he was in the mall,
and most importantly no matter how the hell he chose to hold it in his hand.
Works for him...
So something has changed: a few days ago, fairly easy returns - not replacements,
returns. As of Monday or Tuesday, forget it. Apple company policy appears to be "There is no problem of any kind with the iPhone 4. If the customer is adamant, close the transaction and charge the restocking fee. If the customer refuses, rebut. If the customer persists, grant the refund and get them the hell out of the store, as quietly as possible."
Luckily, we probably saved a few folks from drinking the Kool-Aid.
It's been a good day.
