Some units keep your phone for at least the first 24hrs.
On most of the units, yes they are allowed. On some units, tablets are also allowed. However, charging cords are not allowed. Proctor 2 has a charging station in the hallway with a variety of affixed charging cables that you can use. If you have a USB plug with a 3 or 4 inch long charging cable, you will most likely be allowed to keep it to use. It's a safety issue.
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