Tips for Mobile Telecom Service - Things To Know NÃO RETORNAR chamadas desconhecidas evitando o pagamento de quantias elevadas pela chamada (Portuguese Version) （2018-10-29） Handset after-sales service（2017-04-24） Roaming Data Tips To Help You Travel With Ease (2017-04-07) Tips for using roaming data (Portuguese Version) Knowing the usage period of mobile prepaid cards Remember the Date Promptly Choose Your Promotion Use data services wisely by paying attention to the Internet access method Mobile Data Service Q&A
