Anyone could tell me which modem i should choose from this lists below,
Huawei
E8278
E5577
E5377
E5372
E5776

The e5776 at most expensive better but i always travel and online all the time, and during that time the device will be connected to power supply all time...should i choose e8278 ? But i worry about the signal strength without connecting external antenna...would the 3 mifi work better in signal strength.