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;

	联通	移动	电信
2G	GSM	GSM	CDMA
3G	WCDMA	TD-SCDMA	CDMA
4G

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)

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