I want to load customer collection by email and mobile but not general group
for email load
$customer = Mage::getModel("customer/customer")->loadByEmail($customerEmail);
for mobile
$customer = Mage::getModel("customer/customer");
$customerCollection = $customer->getCollection()
->addAttributeToFilter('mobile', $query)
->getFirstItem();
$entityId = $customerCollection->getEntityId();