Abaikan bagian kode SLI dan kode negara. Tekan kode telepon domestik. Gunakan kode area atau kode ponsel yang benar. Masukkan nomor teleponnya.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
If you live in the United Kingdom and need to dial another country within the United Kingdom, you do not need to dial an exit code or country code, even though the phone call is, in some sense, international. Skip these two pieces of information when placing the call. Instead of dialing an exit code and country code, you need to dial “0” before placing a call to another country within the United Kingdom. This is a “trunk code” which signifies that your call is a “National Destination Code” (NDC)