Hello: Mobile phone software runs, such as android2.2. 1 or above native optimization system installed on Samsung 5830i, which can support dual storage background operation of memory and SD card under add2SD j technology; So S5830i is an upgraded version of memory, but its core chip has not been greatly upgraded. In fact, it doesn't matter that this Samsung low-end mobile phone needs too much memory. In actual use, it may also reduce its running performance and the running stability of the firmware software of the cāo system. A better F is equipped with a high-speed card with a speed of about 8G and above C4, and then set the running software as SD card as far as possible. Then, if ROO is not within the warranty period, after obtaining the full spring limit of the machine, try to slim down the system, or force a custom fast ROM bottom package (you need to be careful when trying to brush the machine). Others: If your needs have exceeded the limit that your body can provide, then it is recommended to enter the main mobile phone. Have a nice day =, = ~ If you have any other questions, please contact me directly, use qiú help or contact us directly for discussion. If you want to know other latest information, you can visit Baidu Iron and Steel Seven Company Lifetime Honorary Group.