How to identify/switch networks where 2 sims are active on your device
Check in Your Phone’s Settings
On Android:
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Go to Settings > Network & Internet > SIM cards (or Mobile Network, depending on your phone).
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Look for a section labeled Mobile data or Preferred data SIM.
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It will show which SIM is currently selected for data. You can switch to the other one if needed.
On iPhone (Dual SIM with eSIM or nano SIM):
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Go to Settings > Cellular or Mobile Data.
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Scroll down to Cellular Data and check which line (SIM) is selected.
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Tap it to switch to the other line if you prefer.