Can someone give a wireless 3g module that is supported by open wrt? but not expensive price
On another forum, I have received other recommendations for the Sierra Wireless cards. The Dell-branded units, while inexpensive, were not recommended to me there due to the complexities and reliability of re-flashing them to "vanilla".
Make sure whatever you pick supports the bands that your provider supports and has sufficient signal strength at your location on those bands.
Watch out with the Huawei in Hilink-mode ("h") models, rather than Stick-mode ("s") models. Only the Stick-mode units expose the interface directly; the Hilink models have internal NAT.
can you give me a specific model?
Looking at the linked thread, that's your thread on the same topic. You might want to ask to have this duplicate closed.
Discussion continues in the thread linked above.
Closing this one now.