This attestation letter pertains to the IPRO S500 mobile phone, model number S500, FCC ID: PQ4IPROS500. It serves to declare the specific functionalities and limitations of the device for marketing purposes. The letter confirms that the phone exclusively supports GSM850, PCS1900, WCDMA B2/B5, LTE B2/4/5/7, BT(GFSK, π/4-DQPSK, 8DPSK), BLE 1M, BLE 2M(2404-2478MHz), 2.4G Wi-Fi(2412-2462MHz, 802.11b/g/n ht20 modes, 2422-2452MHz, 802.11n ht40 mode), FM, and GNSS.
Furthermore, the document explicitly states that certain other functions, bands, and modes have been intentionally disabled by the manufacturer through software. This measure ensures that the end-user lacks the ability to activate these disabled features. This attestation is submitted to the Federal Communications Commission (FCC) for authorization and evaluation purposes.