What Cell Phones Have External Antenna Jack . Do not have usable rf ports. The telstra tough max has an external antenna port, its the only phone on the market at the moment that does have a external antenna port and best still it works on telstra's 700mhz 4g network. PortaPack for HackRF One is Imminent! from www.sharebrained.com The amplifier is about half as powerful as the wilson pro 70 plus, so you won't cover as large of an area, but that's most likely sufficient for most small to medium size homes. I'm not sure about any current phones though. After inquiring with a number of people selling phones on your list they told me their phone had no external jack.
How Does Unlocked Cell Phones Work. In the case of iphones, the handset will be unlocked six months. For some networks, all you need to do is insert a sim card and you're good to go, but for others you're going to need to go to a licensed store or log into your online account and input some of your phone's serial numbers.
The other important factor is the frequency band that carriers are using in. You will need to use a sim card from a gsm provider to get service for your unlocked phone. An unlocked phone is a phone that is not exclusively tied or locked to one particular phone carrier.
Unlocked phones are phones that aren't tied to a specific carrier and can work with different providers (or let you switch providers whenever you want).
On the contrary, an unlocked phone has no network restrictions. A gsm unlocked cell phone or smartphone is a phone that will work with any cell phone provider as long as the cell phone company supports gsm technology. On the other hand, locked phones have software that prevents them from being used by different mobile networks, hence they're locked into a certain network and can only be used with that.
Most foreign carriers also use gsm networks.
Since the phone was originally set up to be on our network, it's possible that it may need to be unlocked from our network to work with metro pcs, but to do so, it would need to be active on our network for up to 180 days. With the exception of iphones, all id mobile handsets sold with a pay monthly id contract are unlocked at the point of purchase. It means that the user can choose the phone carrier that he wants.
That is the frequency bands that cellular signals are transmitted upon.
Moreover, when someone has an unlocked phone, he can have two sim cards from different networks, and he can change from one network to another. A locked phone has a software code that prevents other networks from working with that
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