insufficient signal reception make sure that the signal quality is sufficient, especially prior to purchasing large quantities. The firmware version needs to be 5.0.2 or higher. The SIM card is not included and has to be obtained independently through a mobile phone provider.的翻译：正在翻译，请等待... 什么意思？中文翻译英文，英文翻译中文，怎么说？

不足的信号招待会特别是在购买大量之前确信，信号质量是充足的。固件版本需要5.0.2或更高。 SIM卡片不是包括的，并且必须通过一位移动电话提供者独立地获得。