T-Mobile Samsung E1150. Display diagonal: 36.3 mm (1.43 "), Display resolution: 128 x 128 pixels, Display: CSTN. Internal memory: 0.5 MB. Data network: GSM, GSM bands supported: 900, 1800 MHz. Ringer type: polyphonic. Battery technology: Lithium-Ion (Li-Ion), Battery capacity: 800 mAh, Talk time (GSM): 8.5 h