A sugestão que você fez foi exatamente porque as operadoras de telecomunicações objetaram a essas regulamentações. Um compromisso foi encontrado agora que você não pode usar este truque continuamente.
A partir do comunicado de imprensa de 30 de junho de 2015 Taxas de roaming e Internet aberta: perguntas e respostas :
The rules prevent abusive uses: for example, if the customer buys a SIM card in another EU country where domestic prices are lower to use it at home; or if the customer permanently stays abroad with a domestic subscription of his home country. This is not the usual use of roaming as the vast majority of Europeans experience it. These unusual behaviours are also called 'permanent roaming' and could have a negative impact on domestic prices, and ultimately on consumers. This is why there is a fair use safeguard. Once that limit is reached while being abroad, a small basic fee can be charged. This will be much lower than current caps (maximum prices that operators can charge consumers for roaming in the EU) and is likely to decrease even further. The Commission has been mandated to define the details of the fair use limit.
A partir do comunicado de imprensa de 22 de setembro de 2016 Perguntas e respostas sobre a política de uso justo e outras medidas preparatórias parece que uma definição exata de fair use é deixada para os operadores. O lançamento fala sobre Regras sobre "uso justo" medidas que os operadores podem levar (ênfase minha). Algumas diretrizes são dadas, no entanto:
Fair use policies have to be notified by the roaming provider to the national regulatory authority.
Fighting commercial abuses. Abuses could be related to the mass purchase and resale of SIM cards for permanent use outside the country of the operator issuing them. In such cases, the operator will be allowed to take immediate and proportionate measures while informing the national regulator (e.g. suspension of service on the basis of breach of contractual conditions). The operator has to simultaneously notify the national regulatory authority about the evidence of the systematic abuse and the measures taken. This enables the national regulatory authority to monitor the application of that measure in accordance with the established requirements and to react if necessary.
Individual abuse by customers.Roaming is for travellers. The new draft allows operators to check usage patterns to avoid the abuse of the "Roam like at Home" mechanism. A non-exhaustive list of criteria includes: insignificant domestic traffic compared to roaming traffic; long inactivity of a given SIM card associated with use mostly, if not exclusively, while roaming; subscription and sequential use of multiple SIM cards by the same customer while roaming. In such cases, operators will have to alert their users. Only if these conditions are met, operators will be able to apply small surcharges (the Commission proposed a maximum of €0.04/min per call, €0.01/SMS and €0.0085/MB). In case of disagreement, complaints procedures must be put in place by the operator. If the dispute persists, the customer may complain to the national regulatory authority who will settle the case.