At least for my brief time at LAX and my significant amount of time in Texas my wife and I haven't had issues receiving SMS messages sent to our HK numbers with SoSIM. I've never turned on roaming, and SoSIM's roaming options within the SoSIM app only mention the mainland, the Philippines, Indonesia, and Taiwan, so I'm not sure how activating either one of those roaming services would help receive SMS messages outside of those places.
Also those roaming services are specifically about data not SMS messages which can be sent with areas you could make a call but not necessarily have mobile internet. When I went to the middle of nowhere Texas I had no mobile coverage (SoSIM uses T-Mobile's network just like my super cheap Mint Mobile US SIM) but you just need a second of crappy coverage to send and/or receive a text message.
@LoganH and @vyral_143 Can I double check my understanding on SoSim’s ability to receive sms while overseas and your mobile phone’s settings? Are both Mobile Data OFF and Data Roaming OFF (if on iphone) and the phone can still receive sms as long as your phone is not in airplane mode and a local network provider appears on top?
@hkgcat I didn't turn off mobile data because it's a prepaid SIM, so I can't figure out a way they'll charge me for something. I put my preferred network type as 2G only (I don't think this matters, but it might slightly reduce battery usage). I don't have an iPhone, but again I wouldn't be worried about getting charged for roaming with a prepaid SIM. It'll either work or not, but you won't be paying more or less either way. I just pay 88HKD every 90 days, and thanks to plenty of people on here I've gotten 5HKD a few times from people using my SoSIM referral link, thanks everyone.
SoSim confirmed to me in writing that there is no need to turn roaming on and all SMS are free of charge to receive while overseas. I'll verify this in April when I'm back in the UK and post back to this thread for those who are interested
Can anyone please confirm if they have been able to use SOSIM in India to receive incoming SMS ?
You can look up roaming capabilities here
Last edited by eterrestrial32; 06-05-2022 at 02:55 PM. Reason: Added link for roaming coverage
Successfully received SMS in Australia. Phone calls or data doesn't work.