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Actually, it doesn't. At least, it is not 10 digits all over the world. For example, in Bolivia, the mobile phone number has only 8 digits. The number of digits required (for any particular country) can depend on the following:

- The number of mobile phones (or similar devices) used. If in some country you have, say, 5 million mobile devices, you need at least seven digits.
- Mobile numbers may have to start with certain digits. This may require an additional digit. In the above example, if in a country all mobile phone numbers start with 6, 7 or 8, then 7 digits are no longer enough - the minimum requirement is 8 digits.
- The numbers may be organized so that the first few digits identify the phone company, or the geographical region. This also tends to increase the number of digits, since some areas will have few numbers, while others will have many.

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Q: Why mobile number have 10 digit?

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No. A digit is a single number from 0 to 9

Smallest 2 digit number is 10. 10 + 99 = 109

10 because 10 is the first 2 digit number out of all numbers.

10

6210001000

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Address it to the phone number. The domain depends on the service provider of the recipient:Sprint: @sprintpcs.comVerizon: @vtext.comT-Mobile: @tmomail.net

No. When adding the smallest 2 digit number (= 10) to the smallest 2 digit number (again, 10) the result is a 2 digit number (10 + 10 = 20). When adding the largest 2 digit number (= 99) to the largest 2 digit number (again, 99) the result is a 3 digit number (99 + 99 = 198). As you can see, you'll either get a 2 or 3 digit number, but never a 4 digit number.

The telephone country code for the United States is +1. On a mobile phone, just dial +1 and then the 10-digit US number. On a landline phone, dial 00 1 and then the 10-digit US number.

Because -99 is a two digit number and it is smaller.10 is the smallest positive 2-digit number.Because -99 is a two digit number and it is smaller.10 is the smallest positive 2-digit number.Because -99 is a two digit number and it is smaller.10 is the smallest positive 2-digit number.Because -99 is a two digit number and it is smaller.10 is the smallest positive 2-digit number.

It isn't - in UK it's 11 digits longbecause of huge number of subscribers.when the No. of subscribers will reach near 1 billion . one more digit will be added

There are many useless websites which are outdated. But I found a correctly working mobile number tracking website. CallTracer.org gives you latest information about any mobile phone number. Enter 10 digit mobile number in CallTracer.org and get all name address details of any SIM card.

The largest 10-digit number with no digit repeated is 9876543210 !

Yes, mobile phones in Ireland do have 10 digit numbers.

From a GSM mobile phone, dial +1 310 and the 7-digit mobile number. From a landline, dial 0011 1 310 and the 7-digit mobile number.

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