How do I get my phone to work in Japan?

[iwahora]

I'm in Japan with an Android phone and I have the O2 Travel Bolt-on, and roaming enabled, so should in theory be able to use my phone. In fact it shows that I am connected to one of O2's partner networks (Softbank or NTT Docomo). However, in fact I have no wifi connection and I can't make or receive phone calls. I already contacted O2 chat once and sought (and followed) their guidance, but it makes no difference. Any suggestions about how to fix the problem?

[Bambino]

@iwahora See this guide: Roaming on O2 - All you need to know - O2 Community

Edit: 

You can also use Skype to call customer service: Guide: A Guide to Skype 

Call +44800 902 0217 or +44800 032 1402 or +44800 081 0255
When it comes to the reason you are calling, stay silent for 15 seconds and you will be taken to the keypad options.
Press 2 for Everything Else
Press 5 for More Options
Press 7 for Anything Else which will put you though to someone.
Say 'Upgrade', 'Lost/Stolen', or 'Fraud' if the suggestion above doesn't get you through.
Best time to call is 8 am UK time.
You can also reach O2 via social media:
Facebook (https://o2uk.co/O2CFB), Twitter (https://o2uk.co/O2CTW), or Instagram (https://o2uk.co/O2CIG)

[madasaf1sh]

@iwahora 

Do you have a £0 spend cap, as this will prevent you using any data or making / receiving any phone calls as well whilst roaming. 
Full details can be found here https://www.o2.co.uk/help/account-and-billing/spend-cap

[Breanna]

Hi @iwahora were you able to get this sorted?