Bought to replace my old Huawei E589 I screwed up after trying to insert a micro-SIM with an adapter .... Great product, great for travel, simple, easily configurable interface, ten hours of battery life, a dozen connections possible, and especially compared to E586, you can remove the battery, and SIM card arises in the unit and do not creep in a drawer. Therefore, it accepts mini-SIM adapters / micro-SIM-SIM and mini / nano-SIM that do not remain blocked. The only complaint is the size, but I have still not found a really compact 4G wireless routers such as 3G ....