Dual Sim S23 Ultra

[Romarc]

Hi, dunno if anyone else has had similar issues, but anyways here is my problem. I have 2 sims in my S23, my main number is connected to O2 and on a monthly rolling contract, the other sim is through Vodafone and is on PAYG, here's the problem, when I'm out & about & not in a WiFi network place & I switch on my mobile data, I get a message from Vodafone telling me I'm using mobile data & that it Costs £2 per day ?

I've looked at the settings & cannot see / find a different mobile data switch for each supplier, just one switch for mobile data on or off, turning it on, means by the look of it I'm using mobile data for both O2 & Vodafone, been trying all the different settings, I'm at a loss, any help would be appreciated...thanks..

[sarasphotobox]

Definitely worth contacting your network provider that's deifntely not right at all hope it gets sorted

[PaulC59]

If you go into SIM manager settings it should let you choose which SIM to use for data. Settings - Connections - SIM Manager then you should have options under preferred SIMs

[Romarc]

Aha, thanks PaulC59, didn't think of that, still finding stuff out, I've done that, let's see how it goes..cheers..👍

[Romarc]

Mmmm...thought I'd sorted it out, taking advice from PaulC59, then today got a Vodafone message telling me I'm using mobile data, turns out I've wasted £20 on Vodafone PAYG in the past 3 weeks, so today, I looked at my sim settings again & I've turned off, dual sim always on, (now turned off) & also turned off Data switching & back up calling, as you can tell, I'm not that tech savvy, it's all trial & error, but, why is it so bloody complicated. !! I'll see what happens in the next day or so, if I get another text from Vodafone...🤷‍♂️

[PaulC59]

Data switching should be off if you want to only use one SIM for data. Data switching chooses the SIM with the best signal etc for calls and data which is fine if both SIM cards have plenty free data but if you need to stick with one SIM card for data, turn off data switching. I think data switching only appeared in the latest Android version so you may not have noticed it before. I hope this helps

[Romarc]

Thanks for confirming, seems logical, I'm hoping that does the trick, Vodafone just taking money from me..I'll let you know...cheers again..👍

[S23 Ultra Dual SIM]

Thanks for raising the problem. I have no solution and I have now a SGD220 or USD160 problem.

I have my main number SIM (rolling monthly bill) in my S23 Ultra SIM1 slot, another SIM card for travel in SIM2. When travelling, I set my call and SMS using SIM1 because I still need SMS for various home country transactions.

For mobile data, I switched it to SIM2, as per the instruction of the vendor selling me the travel SIM card. There is a clear display showing these 3 settings.

When I travelled to London, i waited for a while when my SIM2 found its network provider then i started to use mobile data. Subsequently, I took Eurostar to Paris and back to London again. Without me realising, my S23 Ultra had started to use my SIM1 mobile data plan. Only the 2nd day after i was back to London the 2nd time that I received a warning SMS from my original SIM1 service provider which is Starhub in Singapore, that I have used excessive data. By then I already have used up SGD220 or USD160 worth of data. I quickly took out the original SIM1 card from Singapore and slot it into a spare mobile phone that I switched off mobile data altogether. Only leaving call and SMS functions. 

Could Samsung please refund me SGD220? I could show proof of my various bills and setting. I have printscreen showing my 2nd SIM card (travel SIM card) usage of mobile data too.

I really do not need such a adaptive or intelligent switching function of S23 Ultra. I would rather wait for a while before my travel SIM card is activated.

[S23 Ultra Dual SIM]

You have a GBP20 problem while I have a SGD220 (USD160) problem.

I have my main number SIM card (rolling monthly bill) in my S23 Ultra SIM1 slot, another physical SIM card (Simba) for travel in SIM2. When travelling, I set my call and SMS to go through SIM1 phone number because I still need SMS for various home country transactions.

For mobile data, I switched it to SIM2, as per the instruction of the vendor selling me the travel SIM card (Simba). There is a clear display on my S23 screen showing these 3 settings for calls, SMS and mobile data.

When I travelled to London in mid October 23, i waited for a while when my SIM2 found its network provider then i started to use mobile data. Subsequently, I took Eurostar to Paris and back to London again. Without me realising, my S23 Ultra had started to use my SIM1 mobile data plan. Only the 2nd day after i was back to London the 2nd time that I received a warning SMS from my original SIM1 service provider which is Starhub in Singapore, that I had just used excessive mobile data. By then I already had used up SGD220 or USD160 worth of mobile data. I quickly took out the original Singapore SIM1 card (Starhub) and slot it into a spare mobile phone that I switched off mobile data altogether. I only leave this second phone to work for calls and SMS functions. 

Could Samsung please refund me SGD220? I could show proof of my various bills and setting. I have printscreen showing my 2nd SIM card (travel SIM card) usage of mobile data too.

I really do not need such a adaptive or intelligent switching function of S23 Ultra. I would rather wait for a while before my travel SIM card is activated.

I have not got any answers or replies..

[Romarc]

Wow, that's worse than my issue, i think....doubt you will get any kind of refund tbh but defo worth a try, thanks for sharing that, good luck..👍