This is the official Microsoft Lumia 640 LTE Dual SIM User Guide in English provided from the manufacturer. If you are looking for detailed technical Operating instructions and pdf manual for use - Microsoft Lumia 640 RM-1077 8GB Dual SIM Smartphone A00025085 User manual, User manual Microsoft Lumia 640 This is the Instruction manual for the Argos Product SIM FREE MICROSOFT LUMIA 640 BLACK (428/5065) in PDF format. Product support is also available.If you don't have a Microsoft account set up on your new Lumia phone yet, on the start screen, swipe down from the top of the screen, tap ALL SETTINGS > email+ Quick guide lumia 640 lte • Read online or download PDF • Microsoft Lumia 640 LTE Single Sim User Manual. Sales Package. • Lumia 640 3G Dual SIM. • Charger: AC-20. • WH-108 headset (In select markets only). • Battery: BV-T5C (removable). • User guide.