Jiake S6 5.0 inch Touchscreen Android 4.4.2 Unlock Smartphone MTK6582 1G+8G 1.3G Quad Core Cellphone (White) The 5.0 inch touch screen make the phone look more generous. 4.Support 2G and 3G network: 2G: GSM 850/900/1800/1900MHz 3G: WCDMA 850/2100MHz 3.Support Multi-languages such as English,Spanish,Chinese,Cambodian, Indonesian, German, Italian, Dutch, French, Portuguese, Spanish, Russian, Arabic, Vietnamese etc. 2.1.3G quad coresdual cards dual standby.Support TF card up to 32G. 1.Newest version of JIAKE phones with CUP MTK6582and Android 4.4.2 operating system. The normal solution is to check the setting in the cellphone if the data network is turned on. please note that our WCDMA frequency is 850/2100MHz. Sometimes the signal depends on the place you live in. Please check if you have set the phone correctly,if not,there might be a problem with the speaker,please send it back for a replacement. The RAM for the phone is only 1G. If the software occupies too much space the phone will be slow. You need to check out the size of the games software and how many software are running on the backstage. To solve this problem we suggest to restart the phone or download a software that can clear the useless software. Please check if you have removed the black tape before using the phone .We put a black tape on the battery because insulation is needed during the transportation. The phone becomes hot when charging. We suggest to turn off some application program to check if it would be better. If the applications are running all the ways the battery will run out easily.