Review on 📱 10.1 Inch Android Tablet with 2GB+32GB Memory, 3G Phone Tablets & Dual Sim Card Slots, 2MP+5MP Dual Cameras, Quad Core Processor, 1280x800 IPS HD Display, GPS, FM Radio (Black) by Brandon Mercado

My only problem is that the phone doesn't work when I insert 2 SIM cards. I sent an email to the company and they replied very quickly: Dear customer, if you want to use the SIM phone function, please make sure your SIM card frequency range is: 2G Mobile data range: GSM 850 /900/1800/1900. Mobile 3G data band: WCDMA CDMA 850/1900/2100. Just ask mobile phone providers, you will find out the range of SIM cards. If you have a tablet, you can also enter the number on the call page: *#06#, you will get the imei number. Just tell your mobile operators, they will tell you if the imei can match their mobile data.