网络制式

<string-array name="preferred_network_mode_choices">
<item>LTE/TDSCDMA/CDMA/EVDO/GSM/WCDMA </item>
<item>TDSCDMA/CDMA/EVDO/GSM/WCDMA </item>
<item>LTE/TDSCDMA/GSM/WCDMA</item>
<item>LTE/TDSCDMA/WCDMA</item>
<item>TDSCDMA/GSM/WCDMA</item>
<item>LTE/TDSCDMA/GSM</item>
<item>TDSCDMA/GSM</item>
<item>LTE/TDSCDMA</item>
<item>TDSCDMA/WCDMA</item>
<item>TDSCDMA only</item>
<item>LTE / WCDMA</item>
<item>LTE</item>
<item>Global</item>
<item>GSM/WCDMA/LTE</item>
<item>CDMA + LTE/EvDo</item>
<item>CDMA/EvDo/GSM/WCDMA</item>
<item>EvDo only</item>
<item>CDMA w/o EvDo</item>
<item>CDMA/EvDo auto</item>
<item>GSM/WCDMA auto</item>
<item>WCDMA only</item>
<item>GSM only</item>
<item>GSM/WCDMA preferred</item>
</string-array>

<string-array name="preferred_network_mode_values"
translatable="false">
<item>"22"</item>
<item>"21"</item>
<item>"20"</item>
<item>"19"</item>
<item>"18"</item>
<item>"17"</item>
<item>"16"</item>
<item>"15"</item>
<item>"14"</item>
<item>"13"</item>
<item>"12"</item>
<item>"11"</item>
<item>"10"</item>
<item>"9"</item>
<item>"8"</item>
<item>"7"</item>
<item>"6"</item>
<item>"5"</item>
<item>"4"</item>
<item>"3"</item>
<item>"2"</item>
<item>"1"</item>
<item>"0"</item>
</string-array>

/** @hide */
public static final int RIL_RADIO_TECHNOLOGY_UNKNOWN = 0;
/** @hide */
public static final int RIL_RADIO_TECHNOLOGY_GPRS = 1;
/** @hide */
public static final int RIL_RADIO_TECHNOLOGY_EDGE = 2;
/** @hide */
public static final int RIL_RADIO_TECHNOLOGY_UMTS = 3;
/** @hide */
public static final int RIL_RADIO_TECHNOLOGY_IS95A = 4;
/** @hide */
public static final int RIL_RADIO_TECHNOLOGY_IS95B = 5;
/** @hide */
public static final int RIL_RADIO_TECHNOLOGY_1xRTT = 6;
/** @hide */
public static final int RIL_RADIO_TECHNOLOGY_EVDO_0 = 7;
/** @hide */
public static final int RIL_RADIO_TECHNOLOGY_EVDO_A = 8;
/** @hide */
public static final int RIL_RADIO_TECHNOLOGY_HSDPA = 9;
/** @hide */
public static final int RIL_RADIO_TECHNOLOGY_HSUPA = 10;
/** @hide */
public static final int RIL_RADIO_TECHNOLOGY_HSPA = 11;
/** @hide */
public static final int RIL_RADIO_TECHNOLOGY_EVDO_B = 12;
/** @hide */
public static final int RIL_RADIO_TECHNOLOGY_EHRPD = 13;
/** @hide */
public static final int RIL_RADIO_TECHNOLOGY_LTE = 14;
/** @hide */
public static final int RIL_RADIO_TECHNOLOGY_HSPAP = 15;
/**
* GSM radio technology only supports voice. It does not support data.
* @hide
*/
public static final int RIL_RADIO_TECHNOLOGY_GSM = 16;
/** @hide */
public static final int RIL_RADIO_TECHNOLOGY_TD_SCDMA = 17;
/**
* IWLAN
* @hide
*/
public static final int RIL_RADIO_TECHNOLOGY_IWLAN = 18;
/**
* LTE_CA
* @hide
*/
public static final int RIL_RADIO_TECHNOLOGY_LTE_CA = 19;

双4G指的是双制式4G，FDD和TDD。

我比较感兴趣电信版的WCDMA如何用上？国际漫游？
4G 网络        FDD-LTE (B1 / B3) 、TDD-LTE( B41: 2635-2655MHz / 2555-2575MHz)
3G 网络        CDMA(2000 / EVDO Rev.A 3G)、WCDMA(850 / 1900 / 2100MHz)
2G 网络        GSM(900 / 1800 / 1900MHz)、CDMA1x


再看看联通版的，
4G 网络        FDD-LTE(B1 / B3)、TDD-LTE(B41: 2555-2575MHz)
3G 网络        WCDMA(900 / 1900 / 2100MHz)
2G 网络        GSM(900 / 1800MHz)

电信的制式：FDD-LTE (B1 / B3) 、TDD-LTE( B41: 2635-2655MHz / 2555-2575MHz)
联通的制式：FDD-LTE(B1 / B3)、TDD-LTE(B41: 2555-2575MHz)
移动的制式：TDD-LTE(B38 / B39 / B40 / B41: 2555-2655MHz)、FDD-LTE(B3 / B7)

最后

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