GaAs pseudomorphic HEMTs with a gatelength of 0.25 mu m were lifted-off from the GaAs substrate and attached to a MgO-substrate. Only minor differences were observed in the DC and RF characteristics before and after the epitaxial lift-off (ELO). A high extrinsic transition frequency (95 GHz) and a slightly higher microwave gain (MAG=16dB @ 12GHz) were measured after transplantation. Also typical noise characteristics were measured (NFmin=0.9dB @ 12 GHz), indicating that the high frequency noise was not affected by the ELO.