Hello, everyone. I noticed the following glitch (or maybe I am missing something). I have an iPhone 7.
When my phone is registered on a US mobile network i(e.g., T-mobile, or AT&T), I can activate DIGITS data only (right after the DIGITS login screen on iOS) without problems. This happens even if I I put my phone on airplane mode and turn on WiFi only. It seems that the app "remembers" this even in WIFI only mode that I am on a US network. So far so good.
However, when I am on an international network with an international sim card (e.g., Vodafone network with a Vodafone sim card), no matter what I try (cellular data, wifi, both), the link "data only" on the DIGITS app on my iPhone does not work. It is not clickable. I login to DIGITS, and I am able to get in, and then it asks me for US phone number to receive a code. Since I do not have one (at that moment I have an international SIM card inserted) I choose "Data only", but that link never works. It is not clickable.
The workaround, which did allow me to use DIGITS, though at sub-par quality, was to do this while internationally: Insert Tmobile sim card, login into DIGITS, choose data only for the lines, remove the Tmobile card (while keeping me logged into DIGITS) and insert the international sim card. When I do this, I do have access to my virtual DIGITS line, but not in real time. Only when I open the app I get to see the text messages I might have received, which download each time I open the app (I do not receive them otherwise). Phone calls in this scenario never ring, they go straight to voicemail, with no notification. I see that I have a voicemail only if I open the DIGITS app. So, it "kinda" works in the sense that I am able to kind of manually download the text messages by opening DIGITS app, but it is not supposed to work like that.
What am I missing here? I have been travelling overseas several times recently, and even after all the DIGITS updates, I still have this issue. My main reason to use DIGITS is to have virtual access to my US lines when I am on an international sim card on an international network.