How 3G wireless network card to determine whether there is 3G coverage?

Users questions: As the nature of work reasons, I often run around, often drilling ravine, also need to transfer files across the network frequently, so the Internet has become a chronic problem. Sometimes in order to be on a small network, have to run more than ten kilometers of road. Although it has been China Mobile, China Unicom's GSM network launched Internet services, but Expensive, slow, still no solution to my problems. Now, all turned out the company's 3G network, although the coverage is very limited, but I have great hope for it, I think, over time, it will become increasingly popular, more and more expensive . At present it, I am more optimistic about China's power The letter "Wireless LAN" because it covers the widest range, and billing for the time, rather than flow. I went to China Telecom's Office to ask too, and solved my heart was ever doubt the initial of their policy is still very satisfactory. But I encountered the following problem, it is difficult, the waiter did not know How to do it. **************** I am a petroleum worker, I often travel in the wild, one is 2-3 months, stay in one place, work thing. But location is not very fixed, the quarter where the next quarter do not know in what place. After work, it Arrangements in the home leave, rest for 1-2 months. If I go through years of service package, it is uneconomical. I have about six months a year in the wild, there are six months at home. At home I use broadband, LAN, and then package it uneconomical for 3G. So, I chose monthly, according to my work, including Months of use. I used 3G is pure Internet access, not to call. So the phone becomes important, and I intend to buy their own Tianyi a USB 3G card. This does, monthly 29 yuan will pay the basic monthly fee, then pay at the basis of 300 yuan per month, will be able to access 200 Hours. Or very good. However, where I have 3G signal? This is one of the biggest problems. If I paid 300 dollars, went to the local field only to find no signal, then I lose big. I think, can not pay, or just pay the 29 yuan monthly basic fee-based , Through the USB interface Tianyi card to determine whether there is local coverage. If you have coverage, I would pay $ 300 wrapped in 200 hours. If no signal, of course, do not pay up. ****************- Ask you to use to China Telecom 3G Tianyi Friend, had this experience?
Experts answer: computer plug in card, you can search without being connected to the local wireless network, with the percentage of signal strength, generally have more than 30% of the Internet can be very good signal strength. Your plan is feasible, together with the card to bring laptop, anytime, anywhere Can detect the local wireless network signal strength, strength to enable Internet access packages for re-connect to the Internet.
  • This information provided by the users.Thanks!