How long does the new dwellers queue last?

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When clicking the radio room icon that attracts a new dweller to your vault, how long will they stay queued out in front of the vault for before giving up? Or will they?
I'm at max population and would rather not kill existing dwellers to accommodate them in my vault.
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How long does it take for new dwellers to come?
Typically you will get someone every 6 to 12 hours guaranteed. If you are trying to max out your dweller capacity you can always do the time method. In case you are unaware of the time method I will explain, if you manipulate the time on your computer can 1) collect resources faster and 2) collect new dweller faster.How do you get new dwellers quickly?
The fastest and easiest way to do get more dwellers in Fallout Shelter is through the natural method \u2013 conception. Female dwellers can get pregnant if you pair them up with a male dweller in the living quarters. The higher their charisma, the faster it'll take them to get straight to the action and get pregnant.How long does it take to get a baby dweller?
Wait 3 hours. After a dweller becomes pregnant, you'll need to wait for 3 hours before she'll deliver the baby. Although pregnant dwellers can still work, you'll need to assign 1-2 male dwellers to work with them.Why are no dwellers coming to my vault?
New dwellers only pop up at your doorstep in the beginning of the game. After that getting them pregnant or building a radio station will give you new dwellers. Check your building plans to see when the radio station becomes available. It depends on the number of dwellers you have before you can build that.The End of the Backrooms… Level 9223372036854775807
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