China



Overseas visitors requiring Chinese PAYG sim cards, you will first need to show passport.

China Unicom
Unicom are the official iPhone retailer in China.

Deposit of RMB200 required - but monthly charges can be taken from this.

To recover deposit - cancel contract at originating Unicom office, wait 2 months, collect deposit.

Default data rate A range of rates from RMB96 per month including 300MB to RMB886 for 3GB. 

Fair use policy Unknown.

Availability
Regular size pre-paid SIM cards should be available from actual Unicom offices - high streets in China will have tens of outlets, look for the big one.

Sign up as per PDF from this site

SIM sizes Unknown.

Tethering
Included

International Calling
Requires further deposit - this varies from conversation to conversation but RMB300 seems common. Use a callback service on iPhone.