I have just installed the Huawei E5573 wifi modem.
What is the range of wifi signal.
Can it be linked with and extender to increase range.
Will it do any damage to leave it plugged in 24/7.
WiFi range on mine is about 50 meters but that would depend on obstacles or walls. Yes you can use an extender or I believe another E5573 as it has this ability built into the device. I have had mine running for a year on mains power and I haven't burnt the house down yet. Even though modern batteries don't suffer from memory affect as much it would still be advisable to cycle the battery every now and then.