Hello Safa2,
Welcome to the community!
@Safa2 wrote:...Somehow, they get subtituted with mysterious Egyptian local numbers....
Are you saying the caller-ID is showing local Egyptian phone numbers or that it's showing Egyptian characters?
@Safa2 wrote:...Text messages, on the other hand, work completely perfectly....
When you say text messages work perfectly, are you saying the sender's phone numbers appear correct or that the messages are not altered?
To which mobile provider(s) are you connected in Egypt?
@Safa2 wrote:..But my tests mentioned above indicate that it is definitely FIDO's problem...
How did you come to that conclusion? Different Countries use different caller-ID standards (see here). All your tests suggest is that North America and Egypt might have different standards.
Hope this helps 😀
Cheers
Hello again,
Thank you for the additional information.
@Safa2 wrote:..A: Because I tried three local mobile networks here and the result is the same. In this case, Fido is the only common denominator. Different standards have not affected my message communications...
Again, those results only suggest that the issue is between Canada and Egypt. There is no evidence that the same doesn't happen with the other Canadian mobile providers.
Okay, perhaps the issue is not related to different standards. However, voice calls and messages are transmitted differently.
These days, I imagine most International calls are transferred between Countries via voIP protocols. It's more efficient and more cost-effective.
@Safa2 wrote:..A: Showing local Egyptian numbers, not Egyptian characters. Lately, all Canadian calls are shown as "Unknown" numbers....
At one point (and perhaps still ongoing), Egyptian law stated that all International calls needed to pass through via Egypt Telecom and banned voIP services on mobile networks (see here and here). It's possible that all International voIP calls terminate via Egypt Telecom and get forwarded to the mobile providers via a voIP gateway to their final destination. The gateway could be forwarding the calls via local Egyptian phone numbers. It wouldn't matter to which Egyptian mobile provider your phone connected, the calls from Canada would still terminate via Egypt Telecom if they were voIP.
It also explains why your text messages were not affected as those could be sent directly to the mobile providers without the need for a gateway.
I understand you have never before encountered this situation on your earlier visits. It's possible that previously, the calls were transmitted via more traditional methods between the two Countries rather than voIP.
I admit, this scenario is merely my speculation based on the available information.
Hope this helps 😀
Cheers
Hello again,
I understand your frustration. However, the intent was not to place blame. I only wished to provide a plausible explanation.
Fact of the matter is that telecom providers (landline or mobile) have no control over how calls are handled in different countries. Once the calls leave their borders, how the calls are transferred is completely dependent on the destination Country. No blame. That's just how it works. There is no reason to believe that Fido (or any other Canadian provider) would transfer a call overseas with altered caller identification.
Unfortunately, if what I had suggested is in fact true, there may not be any resolution possible. That said, have you tried Egypt Telecom? If, incoming International voIP calls are necessarily routed through Egypt Telecom, perhaps they could connect calls to your phone without the need a voIP gateway.
Hope this helps 😀
Cheers
Hey @Safa2
I'm sad to read you're having trouble with your call display. Just to confirm, has this been happening for all numbers? Also, have you tried resetting your network settings on your end? If not, I would suggest trying that.
Keep us posted!
Hello Scooby-Doo,
Thanks for the input!
The fact that other providers use different bands and frequencies for their networks shouldn't affect the actual call transmission or create any signal confusion. The only issue regarding band/frequency compatibility is whether the phones can connect to the networks. As long as the phone is compatible with the networks (ie has compatible bands/frequencies), it should be able to connect to the network and signals should transmit without any confusion.
That said, to clarify, the 2100MHz stated in GSMArena refers to band 1 (see here and here). On the other hand, Canada uses 2100MHz in conjunction with 1700MHz as band 4. Band 1 and band 4 are not compatible.
@Scooby-Doo wrote:...Fido network currently supports following frequencies: GSM/EDGE: 850/1900 MHz. 3G/HSPA: 850/1900 MHz. LTE: Band 4 (1700/2100 MHz), Band 7 (2600 MHz), Band 17 (700 MHz)...
In addition, that information should be updated as Fido no longer uses band 17. Fido now only uses 700MHz as band 12 (see here).
Hope this helps 😀
Cheers
