What size of traffic are you buying? Is it a TIM card ?
2 Answers
How much traffic card do I need? It's best to prepare an offline map, otherwise the traffic will be too much.
I bought a German Vodafone card on Taobao, with 1G of traffic per month, and it seems to cost around 50 RMB per card. The EU has abolished roaming fees, so it doesn't matter which country's card you buy, as long as it's cheap.