Combine beer, butter and Phillips seasoning into a large stock pot and bring to a boil. You may use 2 cans of beer and two cans of water if you wish to reduce the amount of beer.
Add the head-on shrimp (leave the heads on for flavor), cover and remove the pot from the heat source. Let the shrimp stand in heated liquid for approximately 5 minutes.
Remove the shrimp from the liquid and serve hot.
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