现已声明4 部手机，请将它们存入集合，然后在集合中查找显示所有全新的手机信息。

好的，以下是将4部手机存入集合并查找全新手机信息的代码示例（假设每个手机对象都有isNew属性表示是否全新）：

class Phone:
    def __init__(self, brand, model, isNew):
        self.brand = brand
        self.model = model
        self.isNew = isNew

phone1 = Phone("Apple", "iPhone 12", True)
phone2 = Phone("Samsung", "Galaxy S21", False)
phone3 = Phone("Xiaomi", "Mi 11", True)
phone4 = Phone("OnePlus", "8T", False)

phones = [phone1, phone2, phone3, phone4]

# 查找全新手机信息
new_phones = []
for phone in phones:
    if phone.isNew:
        new_phones.append(phone)
    
# 打印所有全新手机信息
for phone in new_phones:
    print("Brand: {}, Model: {}".format(phone.brand, phone.model))

输出结果为：

Brand: Apple, Model: iPhone 12
Brand: Xiaomi, Model: Mi 11