[Q] Using CM9 for GSM Abroad?

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I'm going to be traveling to the London soon and will want to put a local SIM in my Photon. I'm currently running Joker's CM9 and loving it, but I'm wondering if I'll have any problems using it on a GSM network abroad.

Does anyone have much experience with this? Will CM9 work? Can I use it for data as well as voice? Are there better options out there?

I think the best thing you can do is flash your photon to gsm while you are on the go and when you are back just flash it back to cdma but make sure you make a backup before you flash to gsm in case something goes wrong.

currently using mine in taiwan with twmobile prepaid sim. can use data as well, but it eats up the credits pretty quickly