- Roaming
- http://oglobo.globo.com/tecnologia/pacotes-promocionais-reduzem-em-ate-90-valor-de-roaming-5164953http://oglobo.globo.com/….
- Claro tem opção interessante com Passaportes Américas / Europa e Mundo
- Frequencias GSM banda (frequencia)
- https://en.wikipedia.org/wiki/LTE_frequency_bands
- https://play.google.com/store/apps/details?id=net.simplyadvanced.ltediscovery&hl=pt_BRhttps://play.google.com/….
- https://tecnoblog.net/384076/quais-as-bandas-de-4g-no-brasil-saiba-a-da-sua-cidade/https://tecnoblog.net/….
- https://sistemas.anatel.gov.br/se/public/view/b/licenciamento.phphttps://sistemas.anatel.gov.br/…./licenciamento.php
- Brasil
- 3G - 1(2100), 2(1900), 5(850)
- 4G/LTE - 3(1700/1800), 7(2500/2600), 28(700 APT)
- USA
- T-Mobile 4(AWS 1700/2100)
- http://www.gsmworld.com/roaming/gsminfo/cou_br.shtmlhttp://www.gsmworld.com/…./cou_br.shtml
- http://en.wikipedia.org/wiki/UMTS_frequency_bands
- http://www.teleco.com.br/areasc.asp
- http://www.teleco.com.br/3g_freq.asp
- https://www.frequencycheck.com/
- 4G / LTE
- *#0011#*
- Em alguns aparelhos permite ver as frequencias utilizadas
- http://android.stackexchange.com/questions/23572/how-to-tell-current-frequency-bandhttp://android.stackexchange.com/….
- Dados GSM
- Femtocell
- Operadoras Celular