Mobile Phones - How come you can't have more than 1 with the same number

james t kirk

Well-known member
Aug 17, 2001
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If you have a land line, you can have 20 extensions in your house. No problem.

Then how come you can't have 4 mobile phones all with the same number?

I realize that each phone has a sim card, but why can't you have 4 or 5 sim cards.

That way, you never lose your damn phone, or forget your phone. Just keep one in the car, one in the office, one at home, and one on you.

etc.

What is the reason?
 

GPIDEAL

Prolific User
Jun 27, 2010
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If you have a land line, you can have 20 extensions in your house. No problem.

Then how come you can't have 4 mobile phones all with the same number?

I realize that each phone has a sim card, but why can't you have 4 or 5 sim cards.

That way, you never lose your damn phone, or forget your phone. Just keep one in the car, one in the office, one at home, and one on you.

etc.

What is the reason?

They would have to be linked somehow so that you can't be on a call or two with each separate unit. Is it possible if there's distance between them (keep one up at cottage, one at home)? Seems like it would be more expensive to manage. Why do you need more than one if your cell is mobile in the first place?
 

james t kirk

Well-known member
Aug 17, 2001
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They would have to be linked somehow so that you can't be on a call or two with each separate unit. Is it possible if there's distance between them (keep one up at cottage, one at home)? Seems like it would be more expensive to manage. Why do you need more than one if your cell is mobile in the first place?
Convenience.

I'm prone to leaving my phone at home and walking out the door, then realizing it when I'm not that close to home any more.

I've got about 3 old cell phones laying around that would be fine to fire back up again.

Don't see why not.
 

bishop

Banned
Nov 26, 2002
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There are dual sim phone out there, and I would hazzard to guess that there are triple sim phones out there, quad sims I have no idea but quad sims is borderline silly.
 

pusher69

Active member
Jun 11, 2006
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This has to be the most idiotic question of the year.
1. take out your SIM card... works on most phones.
2. your home phone line has a switch that splits the connection for multiple extensions.

learn to use google.
 

james t kirk

Well-known member
Aug 17, 2001
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This has to be the most idiotic question of the year.
1. take out your SIM card... works on most phones.
2. your home phone line has a switch that splits the connection for multiple extensions.

learn to use google.
Learn to read.

Your home phone line comes into the house and then runs jack to jack, or, you can install a hub in your basement and run home runs to any number of jacks. There is no "switch" for multiple extensions. There is a line and you can split it into any number of parallel connections.

2. I'm not looking to simply switch the SIM card between phones. That wasn't my question. Read my first post again since obviously you have reading comprehension problems. I'm wondering why I can't have 3 mobile phones, all active, all with the same number.
 

Mr Deeds

Muff Diver Extraordinaire
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You could try call forwarding . Might work
 

pusher69

Active member
Jun 11, 2006
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I answered your questions... #1 take out your SIM card.
Looks like you need a Mr. Spook to explain it to you.

You home line comes into your house. Look for that little white box. From there the line either goes to all phone jacks or they are split (if you if have multiple numbers) from there.

Final.. you CANNOT have multiple cell phones using the same NUMBER at the same time.... Don't forget your phone
 

JohnHenry

Well-known member
Aug 27, 2003
1,321
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rural ontario
Get a Single Number Reach phone number from Bell, and then log into their web site, and call forward that number to the cell phone closest to you.
Will cost you 25 for the SNR number, and whatever you pay for 3 cell phones.
 

Promo

Active member
Jan 10, 2009
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I answered your questions... #1 take out your SIM card.
I'm curious Mr Spook, exactly how does that solve his problem?

Looks like you need a Mr. Spook to explain it to you.
It's spelt "Spock". If you are trying to act superior, best not to f*ck it up or you end-up looking like an idiot.

You home line comes into your house. Look for that little white box. From there the line either goes to all phone jacks or they are split (if you if have multiple numbers) from there.
You are using wrong terminology and it's not a "little white box" in most cases. But it doesn't matter, because that's not his question.

Final.. you CANNOT have multiple cell phones using the same NUMBER at the same time.... Don't forget your phone
Why couldn't you have said that in the first place? Do you know that for a FACT, or are you just guessing? Your tech credibility is pretty poor right now.
 

xcites

New member
Feb 21, 2006
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It's called SIM cloning. But it's not allowed on any wireless carrier I know of and outlawed in most countries.

It makes it hard for law enforcement to pin point your location :) And rumour has it that they use this technology to eavesdrop on ppl too.
 

pusher69

Active member
Jun 11, 2006
539
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I'm curious Mr Spook, exactly how does that solve his problem?


It's spelt "Spock". If you are trying to act superior, best not to f*ck it up or you end-up looking like an idiot.


You are using wrong terminology and it's not a "little white box" in most cases. But it doesn't matter, because that's not his question.


Why couldn't you have said that in the first place? Do you know that for a FACT, or are you just guessing? Your tech credibility is pretty poor right now.
Can't help if smartphone auto-corrected Spock.

FACT, cells work on IEMI and SIM card (you can ghost a IEMI, but SIM card are a bit harder and the network will ban the SIM if it detects the clone and real one), this is why each new Smartphone on a GSM network, requires a SIM card to use the device/cell.
They only technology that will allow you to use a number on multiple phones is a VOIP line and you log into the service... but its not a carrier provided number.
 

destillat

Well-known member
Aug 29, 2001
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Can't help if smartphone auto-corrected Spock.

FACT, cells work on IEMI and SIM card (you can ghost a IEMI, but SIM card are a bit harder and the network will ban the SIM if it detects the clone and real one), this is why each new Smartphone on a GSM network, requires a SIM card to use the device/cell.
They only technology that will allow you to use a number on multiple phones is a VOIP line and you log into the service... but its not a carrier provided number.
That is a whole lotta "whaaaaa????"
 

roger20

self aware
Feb 21, 2004
180
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Not a fact! It's IMEI...

You can't have more than one cell phone use the same number because of the tech used to make cell phones work isn't the same as landlines so the comparison isn't there.
 

james t kirk

Well-known member
Aug 17, 2001
24,031
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It's called SIM cloning. But it's not allowed on any wireless carrier I know of and outlawed in most countries.

It makes it hard for law enforcement to pin point your location :) And rumour has it that they use this technology to eavesdrop on ppl too.
Now this makes sense.

We are all tethered to having a single cell phone it seems.
 

james t kirk

Well-known member
Aug 17, 2001
24,031
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Not a fact! It's IMEI...

You can't have more than one cell phone use the same number because of the tech used to make cell phones work isn't the same as landlines so the comparison isn't there.
I wasn't comparing the technology, I was only comparing the concept of having multiple phones on the same line.
 

oldjones

CanBarelyRe Member
Aug 18, 2001
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I belive the guy who sold just such a service—and fought the carriers and CRTC to do so—out of a storefront at Dav and Ave. went outta business.

From the customer PoV: If all three phones you had assigned your number to were switched on, sitting in places all over creation where you'd forgotten to take them with you and a call came in, how would you and the various carriers you'd bought the service from cope with helpful folks answering them and/or the same voicemail dropping into three different accounts? What if all three tried to originate calls simultaneously?

Still I could imagine a carrier offering a package that did all the smartphone stuff on their server via their net to which you could add as many dumb handsets as you wanted, with any two becoming dead slaves whenever the active one was in use. You'd need a PIN every time though.
 

fuji

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You can do it if you use a VOIP number but the call quality will decrease as your calls will go over mobile data, which doesn't have the same priority as native voice traffic on the air interface between your phone and the cell tower.

With a VoIP number you can easily have as many phones ring as you like including multiple mobile numbers AND land lines.

The cell companies could easily orifice this service but they choose not to because it would encourage you to view them as a commodity. They would rather have you locked in to their service by relying on your handset's link to them rather then diversifying to multiple devices. Business decision. They were reluctant even to introduce WiFi calling until recently.
 
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