Can't change sim for mobile data - LeEco Le Max 2 Questions & Answers

Hello,
I'm trying to change the sim card for mobile data but it is blurred out. What could be the problem?
i,imgur,com/ysEfKVP,jpg

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Which model you have and which ROM is on board?

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Same issue.
I have the same issue with my x829 on the stock EUI 5.0.16S.
I've looked for all the settings and can't seem to make the option appear selectable.
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Same issue too, cannot switch mobile data on sim 2
Like Tiago,
My le max 2 x829 on eui 5.8.16s
Please help.

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Only SIM 1 supports data. SIM 2s functions are very limited.

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Immortal68 said:
Only SIM 1 supports data. SIM 2s functions are very limited.
Click to expand...
Click to collapse
"This is obvious not true. I have x522 S3. If I use the chinese newest rom: EUI Version: 5.9.026S, I can connect to 4GLTE by switching between two sims. If I use the newest US ROM: 5.8.021S, the mobile data option is grey, and cannot be changed. It looks to me that it is a software problem.
However, I can only use wifi calling (Tmobile) using 5.8.021S. The wifi calling function on 5.9.026S gives me error 99.
It is a shame that le eco cannot update the US version to 5.9."
In US ROM: 5.8.21S, root the phone, then use buildprop editor to change the value:
persist.le.fixDataSimForNA=true
to
persist.le.fixDataSimForNA=false
Now you can switch data between two sims.

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hubh98 said:
"This is obvious not true. I have x522 S3. If I use the chinese newest rom: EUI Version: 5.9.026S, I can connect to 4GLTE by switching between two sims. If I use the newest US ROM: 5.8.021S, the mobile data option is grey, and cannot be changed. It looks to me that it is a software problem.
However, I can only use wifi calling (Tmobile) using 5.8.021S. The wifi calling function on 5.9.026S gives me error 99.
It is a shame that le eco cannot update the US version to 5.9."
In US ROM: 5.8.21S, root the phone, then use buildprop editor to change the value:
persist.le.fixDataSimForNA=true
to
persist.le.fixDataSimForNA=false
Now you can switch data between two sims.
Click to expand...
Click to collapse
This could very well be a software issue, but the x522 S3 is a different device altogether. Not sure where you take the confidence to say that it's definitely not a hardware issue, since we're talking about the Le Max 2, not the S3.