China mobile networks operates much in the same way, however there are a few wrinkles that you should be aware of — so here is a guide to help you figure out which SIM card to get when you come to China. Network: The 2nd largest mobile carrier in China, and is the only carrier that has 3G that will work with phones from outside China.
The largest mobile carrier with about 70% market share. So even if you for some unknown reason find yourself out in rural-nowhere China, you might not be able to find a real toilet, but at least you will still be able to get a SIM card there. Coverage: China Unicom coverage is not as extensive as China Mobile, but is still very good.
Data refills usually go for about 50 RMB for 1 GB of data.
If you want to look at other plans on China Unicom check out their service site 10010
It covers nearly 90% of the population, so chances are you will be covered wherever you are.
Network: China Telecom uses a CDMA network which is incompatible virtually all phones purchased outside China. It has 3G / HSPA that works with international mobile phones and the coverage is almost as good as the leader, China Mobile.
I like to be flexible so I tend to stay away from contracts. A VPN will be necessary when you are travelling or living in China since most everything (gmail, google, youtube, facebook, instagram) is blocked in the Mainland (Hong Kong is unblocked).It takes advantage of the same i OS 7 tool Apple uses for its Air Drop feature, pictured right Instead of sending messages using mobile or data signal, the features lets users send messages to people in close proximity that are in Bluetooth or Wi-Fi Direct range - up to around 30 feet (9 metres).If you are coming to China for travel, work, or living — and you are a self respecting citizen of our modern world — then you will need a China SIM card in order to stay connected to the web through your mobile phone and to make calls (or SMS text messages, but I don’t know anybody who still uses SMS now in the days of Facebook messenger, Whatsapp, LINE, We Chat, and Kakao Talk).Under the “wallet” section, there is an option to top up your mobile phone (general add money or buy data only).For this you will need a bank card linked to your We Chat or some funds in your We Chat account (lucky money! You could also ask a Chinese friend to help you out with this, since any Wechat / Alipay account can be used to top up any phone number (just type it in and pay).
In particular if you want to check out 3G packages: companies can sell you a pre-paid SIM card and deliver it to you before you get to China.