I've already used the Weill toll-free number. Why is the mobile phone still charging?

His software uses the principle of free calling, but if it is a long-distance roaming, it still costs money to answer the phone. I suggest that if you want to use this software, you'd better change the package and switch to a national free phone call. I am also using micro-will. I mean, Unicom's package is free to answer calls nationwide, with 0.25 megabits of calls, 50 minutes of free calls and 200 free text messages.