Why Is My iPhone 4 Struggling To Pick Up a Wifi Signal My Macbook Has No Problem Receiving?

I have both an iPhone 4 and a late 2009 Macbook. I work at an office just a few yards from the local hospital. The hospital has a public wifi that is definitely receivable, although weak in spots. But what I have noticed is that my iPhone 4 has a real hard time finding the signal and keeping it. I usually only get 2 bars max, out of the three on the signal graphic on the screen of the iPhone. It drops out often on the iPhone. However, when I connect with my Macbook, the connection is solid and it displays that I am getting a full signal. The signal doesn't drop on the Macbook. My question is why is there a difference between the iPhone and Macbook in picking up a wifi signal? Do iPhones not have as much sensitivity to pick up a weaker signal? Is there something I can do to the iPhone to enhance its reception?

They better huh?
I'm sure Apple is shaking in their boots.
No such problem with my iPhone which I connect with a number of wi-fi networks.
If the same problem with any other wi-fi network besides your own and no change after resetting network settings and/or after restoring the iPhone as a new iPhone or not from the backup, the iPhone has a hardware problem.
If the problem is with your wi-fi network only - no problem with any other wi-fi network besides your own, the problem is not with the iPhone.

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You may find this article helpful when troubleshooting iTunes not recognizing your iPhone. If you have any security software, disable this software and test the results.
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http://support.apple.com/kb/TS1591
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~~~~~~~~~~~~~~~
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Phone not recognised in itunes
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HT1695 hi my iphone 4s keeps on loosing my wifi signal in my home

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Morning sylvestersteve,
Thanks for using Apple Support Communities.
For more information on this, take a look at this article:
iOS: Troubleshooting Wi-Fi networks and connections
http://support.apple.com/kb/ts1398
Resolution
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Basic troubleshooting
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Read this:
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