NTT DoCoMo announced today that it has developed the world’s first dual-mode small-cell base station, or femtocell, supporting 3G (W-CDMA) and LTE simultaneously for improved service coverage in indoor locations such as offices, shops and homes. DOCOMO’s new femtocell, which weighs only 0.7 kg and measures just 18.5cm by 17.5 cm by 4.5 cm (H…