Hello Mariusc1,
Welcome to the community!
Sorry to hear you weren't able to use your services while in the US.
@Mariusc1 wrote:...IF I cant get 100 % certainty from FIdo managment that this disaster willnot happen again in December 2020 when Iam In Arizona it will be good bye to Fido...
Unfortunately, no mobile provider will be able to provide absolute assurance you'll be able to use your services abroad. Anyone who does is lying to you. The mobile providers can't even guarantee that you'll be able to adequately use your services everywhere in Canada, within their own networks. The nature of cellular service is that it relies on proximity to, and adequate signal from cellular towers. Since cellular service is transmitted via airwaves, many factors can affect cellular signal (see here). No provider can know where a customer intends on using their services and whether there are any potential sources of interference. Even satellite phones have their own set of limitations.
When outside of Canada, roaming devices use the local infrastructure. In addition to verifying adequate coverage of the local providers, customers would need to ensure their devices are compatible with the local networks' bands/frequencies (see here).
The only thing your home mobile provider can offer is to ensure that there are no roaming blocks on your account.
I understand my reply might seem unsatisfactory to you, however, hope this helps 😀
Cheers
