An apparatus comprising: a substrate ; an antenna comprising: a first conductive element having a first electrical length and connected to a first antenna terminal ; and a second conductive element having a second electrical length connected to a second antenna terminal , wherein at least the first conductive element is supported by a first portion of the substrate, wherein the second conductive element is supported on a second portion of the substrate, different to the first portion, wherein a Young's Modulus of the second portion is greater than a Young's Modulus of the first portion, and wherein at least the first portion of the substrate is thereby configured to deform from a first configuration to a second configuration to: cause an asymmetric change in the physical lengths of the first conductive element and the second conductive element; change the first electrical length of the first conductive element relative to the second electrical length of the second conductive element; and add or remove at least one operational resonant mode of the antenna, wherein an operational resonant mode has an operational bandwidth over which the return loss of the antenna is greater than an operational threshold for telecommunication and the operational bandwidths of operational resonant modes do not overlap. a substrate ; an antenna comprising: a first conductive element having a first electrical length and connected to a first antenna terminal ; and a second conductive element having a second electrical length connected to a second antenna terminal , a first conductive element having a first electrical length and connected to a first antenna terminal ; and a second conductive element having a second electrical length connected to a second antenna terminal , wherein at least the first conductive element is supported by a first portion of the substrate, wherein the second conductive element is supported on a second portion of the substrate, different to the first portion, wherein a Young's Modulus of the second portion is greater than a Young's Modulus of the first portion, and wherein at least the first portion of the substrate is thereby configured to deform from a first configuration to a second configuration to: cause an asymmetric change in the physical lengths of the first conductive element and the second conductive element; change the first electrical length of the first conductive element relative to the second electrical length of the second conductive element; and add or remove at least one operational resonant mode of the antenna, wherein an operational resonant mode has an operational bandwidth over which the return loss of the antenna is greater than an operational threshold for telecommunication and the operational bandwidths of operational resonant modes do not overlap. cause an asymmetric change in the physical lengths of the first conductive element and the second conductive element; change the first electrical length of the first conductive element relative to the second electrical length of the second conductive element; and add or remove at least one operational resonant mode of the antenna, wherein an operational resonant mode has an operational bandwidth over which the return loss of the antenna is greater than an operational threshold for telecommunication and the operational bandwidths of operational resonant modes do not overlap. <EOS>