I need to insert my sim card into my Huawei Hilink dongle

SOURCE: Insert SIM Card

make sure the sim card can make good contact with the phone.
Also check if it doesn't have space to slide, causing it to loose contact with the phone.

SOURCE: my samsung says insert sim card...

u should have to check your sim card nd insert a sim car in right way

SOURCE: z550i insert sim card

The problems i have with the Ericcsons are that they cards do not stay in very well. Is it on the top? Try pressing it down when you transfer or whatever and see if it works. If so then i suggest taping it down something similar.

SOURCE: my sim card doesnt work in my sciphone i68+

I see that this had been a while. The reason that your Sim cad doesn't work could be various: 1. Make sure that your phone is quad band, if it's a tri band then make sure that ATT works in 1900mhz. If it works only in 850 and your i68+ is a tri band, (which is not suppose to) then it will never work. As far as I know all i68+ original are quad band, some fakes i68+ are sold as quad band but are actually tri-band. 2. If you ATT sim card is a 3g card, it won't work either. These phones are not yet equip to work with 3g. I hope this clear up at least a little of your doubt with the Sciphone.

SOURCE: Sim card

if this is a new sim never been in the phone before it will require registering if is has been used before in the phone try another sim if that works the sim is faulty