Transfer internet data from one sim to another

Asalam-o-alaikum
I have two stc sims on two phones.
Phone 1 has internet sim (prepaid).
Phone 2 has calling sim (prepaid).
Both sims are on my iqama.
On phone 1, I have more than 200 GB of data available.
How can I transfer some of that data to my phone 2?
Thanks

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