直接修改Market包显示支持收费软件，首页推荐软件

目前用MarketEnable，MarketAccess 之类的软件可以做到，但也有缺点：被修改apn，重启后无效。

大陆第三方ROM,一般都直接修改了电子市场包，观察一下安卓网自制的ROM,build.prop中都多了两行代码：

hiapk.vending.operator.name=T-Mobile
hiapk.vending.operator=310260

把运营商改为美国的。然后用

SystemProperties.get("hiapk.vending.operator.name");
SystemProperties.get("hiapk.vending.operator");

替换

TelephonyManager.getSimOperatorName();
TelephonyManager.getSimOperator()

下面是我修改的2.2.7版本的patch:

$ colordiff Vending_o/smali/com/android/vending/VendingApplication\$ApiClientContext.smali Vending/smali/com/android/vending/VendingApplication\$ApiClientContext.smali 
239,245c239
<     iget-object v2, p0, Lcom/android/vending/VendingApplication$ApiClientContext;->this$0:Lcom/android/vending/VendingApplication;
< 
<     invoke-static {v2}, Lcom/android/vending/VendingApplication;->access$100(Lcom/android/vending/VendingApplication;)Landroid/telephony/TelephonyManager;
< 
<     move-result-object v2
< 
<     invoke-virtual {v2}, Landroid/telephony/TelephonyManager;->getSimOperatorName()Ljava/lang/String;
---
>     const-string v2, "T-Mobile"
247c241
<     move-result-object v7
---
>     move-object/from16 v7, v2
259,265c253
<     iget-object v2, p0, Lcom/android/vending/VendingApplication$ApiClientContext;->this$0:Lcom/android/vending/VendingApplication;
< 
<     invoke-static {v2}, Lcom/android/vending/VendingApplication;->access$100(Lcom/android/vending/VendingApplication;)Landroid/telephony/TelephonyManager;
< 
<     move-result-object v2
< 
<     invoke-virtual {v2}, Landroid/telephony/TelephonyManager;->getSimOperator()Ljava/lang/String;
---
>     const-string v2, "310260"
267c255
<     move-result-object v9
---
>     move-object/from16 v9, v2

重新打包，签名即可。