This article is intended to suggest a mobile‐embedded antenna with tunable capacitance and the validity of the proposed solution was proved through design, fabrication, and measurement. The aforementioned antenna is applicable to long term evolution (LTE), including band 5, band 8, band 13, and band 17 that are in use today. The 4G mobile services' antennas need to ensure the extension of bandwidth in order to include LTE bands as well as other different services. Low‐band characteristics, however, are difficult to achieve mainly because of lack of space for antennas in terminals. The problem may be solved by using a SP4T switch of RFMD, which is to generate the operation frequency of low‐band tunable. The optimized parameters were able to fabrication and measure antennas. Hence, antennas come to meet with operation frequency and performance for low bands; also, the performance of the fabricated antenna that has been measured with the optimized parameters has been compared and analyze. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:556–559, 2015