Apparatus for heating hair clips having a heatable member comprises a base, a heating structure, and means for providing electricity to the heating structure. In this way, the WCD is more likely to receive sufficiently strong signals from at least one wireless coverage area with which the WCD is communicating, potentially resulting in a decrease of the likelihood that the WCD roams. According to a first aspect of the invention there is provided a method for the augmentation of subcutaneous or dermal tissue in a subject, which method comprises the steps of: providing a suspension of allogeneic dermal fibroblasts; and injecting an effective volume of the suspension into tissue subadjacent to the subcutaneous or dermal tissue so that the tissue is augmented.